The red squares (sawblades) and the orange squares (gears and machinery) are not walls, they can be moved through, but doing so is dangerous.

Dex save (DC15) or 2d8 slashing damage if you enter, or start your turn on, a red square.

Dex save (DC15) or 2d8 bludgeoning damage if you enter, or start your turn on, an orange square.

The characters with the magenta circle around them are on the catwalk. The catwalk is 10' up, and hugs the wall. (characters on the catwalk can be anywhere along the perimeter of the room, in other words, and there are no saws or gears along the catwalk)

Doc's spell, Spiritual Weapon, is along the catwalk as well.

[EDIT — The Spiritual Weapon is next to the baron ... I will correct its location on the next map]

Con save 22

Chromir takes another reckless attack (20 to hit) dealing 13 slashing damage. And then as a BA he restarts his rage, this time matching (were)wolf for wolf, as he lets out a howl of his own, a spectral wolf appearing around his body howling alongside him, before merging with Chromir.

All allies have advantage on anyone within 5ft of Chromir (so for this round, Navrine and Cass have advantage on Thorne. And Doc will next round provided Thorne does not move)

Cassian feels a surge of confidence at having his allies fighting by his side, bolstered by Chromir's wolf spirit.

Action: longsword to hit w Advantage 23+2 sacred weapon+4 bless= 25, damage 5 radiant

Bonus Action: Divine Smite for 12 radiant damage

Navrine presses the attack on Baron. While keeping an eye on the guard who shot her.

Action: Unarmed Strike (11, 7)+5 for 16 to hit, (4)+3 for 7 points of damage.
Bonus action: Flurry of Blows(second focus point) First blow: (17, 7)+5 for 22 to hit, (2)+3 for 5 points damage. Second blow: Hand of healing to herself (3)+2 for 5 points healing.

Doc gets his Warhammer from his back and closes in to the guard, attacking, while the spiritual weapon goed for the baron ones more (yeah, thanks for the correction I indeed wanted it next to the baron) 

Warhammer: 10 for 9dmg

Sw: 23 for 7 dmg

The battle turned in the party's favor!

Doc’s spectral hammer struck first, slamming into the werewolf’s ribs with a force that sent it staggering. Chromir followed, his axe carving another deep wound into the beast’s hide. Thorne snarled, but before he could retaliate, Navrine darted in, driving a pair of precise strikes into his side. The werewolf faltered, and Cassian seized the moment — divine light flared as the paladin's sword found its mark, cleaving through fur and flesh.

Thorne let out a final, ragged howl before collapsing, his monstrous form twitching and reverting to human as he hit the bloodstained floor.

Above, the sniper lunged at Doc with his greatsword, but the cleric sidestepped both wild swings.

Below, a second guard appeared in the doorway, leveling his crossbow. The bolt flew true, burying itself into Chromir’s shoulder.

The barbarian barely flinched—his rage burned hotter than pain.

Init - PC [HP]; Conditions & Effects; Actions
14 — Doc [18 / 27hp]; Concentrating*; warhammer vs guard#1, a miss!
    — SW vs Thorne, a hit! (7hp force)
06 — Chromir [31 / 43hp]; Reckless Greataxe vs Thorne, a hit! (13hp slashing)
06 — Navrine [15 / 24hp]; Unarmed Strik vs Thorne, a hit! (7hp bludgeoning)
    — Flurry of Blows, Unarmed Strike vs Thorne, a hit! (5hp bludgeoning)
    — Flurry of Blows, Hand of Healing vs Self (+5hp)
01 — Cassian [33 / 33hp]; Imbued Longsword W/ Divine Smite vs Thorne, a hit! (17hp radiant)
    — This attack brings Baron Thorne to 0hp remaining.

Init — Name, AC [hp inflicted]; Conditions & Effects; Actions
14 — Guard #1, AC17 [14hp inflicted]; Two greatsword attacks vs Doc, both miss! (rolled two nat 1's in a row!!!)
14 — Guard #2, AC17 [00hp inflicted]; Two crossbow attacks vs Chromir, one hits! (15hp piercing, reduced to 7hp)
   — The crossbow attack pushed Chromir 10', moving through a red square.  
   — Please roll a Dex save [DC15] or take 7hp slashing (which would be reduced to 3hp)
---
Beginning of next round ...
Init — Name, AC [hp inflicted]; Conditions & Effects; Actions
17 - Baron Thorne, AC15 [71hp inflicted]; Dead 

*I forgot to call for a concentration check when Doc was struck by the guard last round, and rolled one now.  He passed!

The baron is no more.  Heroes are up!

Ongoing Effects
Chromir — Rage, 10 minutes
Doc — Stonecunning (Tremorsense 60'), 10 minutes
Doc — Spiritual Weapon, 09/10 rounds remaining

The red squares (sawblades) and the orange squares (gears and machinery) are not walls, they can be moved through, but doing so isdangerous.

Dex save (DC15) or 2d8 slashing damage if you enter, or start your turn on, a red square.

Dex save (DC15) or 2d8 bludgeoning damage if you enter, or start your turn on, an orange square.

The characters with the magenta circle around them are on the catwalk. The catwalk is 10' up, and hugs the wall. (characters on the catwalk can be anywhere along the perimeter of the room, in other words, and there are no saws or gears along the catwalk)

Navrine runs close with the 2nd guard.

Movement: 40’ ((or as much as it take to get in melee range))

Special Action: Use one luck point to gain advantage on the attack on guard #2.

Action: Unarmed Strike (9, 19)+5 for 24 to hit, (2)+3 for 5 points of damage.

Bonus action: Flurry of Blows(third focus point) First blow: (20 crit)+5 for 25 to hit, (4+3)+3 for 10 points damage. Second blow: (13)+5 for 18 to hit, (4)+3 for 7 points damage.

Chromir manages to dodge the sawblades as he is pushed through (21 dex save) while simultaneously reducing the damage by 8 (stones endurance, so no damage taken) and then he runs back around the sawblades and shoves the Baron onto the sawblades (and being unconscious, he automatically fails str and dex saves). Any left over movement is spent heading in the direction of guard 2.

Cassian's first instinct is to move after Chromir and Navrine immediately, but a faint pull in his chest makes him pause and look towards the wicked saw and the Baron's unconscious form. Joy...what would you do? Frowning, he reaches to grab the man and haul him away from the blades. He then doesn't spare a second glance before hurrying to join the others.

Action: Grab and move Baron 5 ft right (Athletics 19)

Bonus Action: Lay on Hands on Navrine (if his remaining movement allows) for +9 HP

Doc goes for the guard again while is spiritual weapon flows up to also help

Warhammer: 23 for 9dmg
SW: 12 for 7

The battle raged on, the heroes were forced to split their focus.

Above, Doc fought desperately against the veteran guard. The warrior’s greatsword came down in a brutal arc, cutting through Doc’s defenses. Pain flared, and his concentration wavered — his spectral hammer flickered and vanished! 

Below, chaos erupted. In his fury, Chromir hoisted the unconscious Baron Thorne and hurled him into the grinding machinery. Wood groaned, gears shrieked, and blood splattered across the floor—but before the saw could finish its grisly work, Cassian intervened. The paladin lunged forward, dragging the broken, barely-breathing baron from his fate.

Navrine, left alone against the remaining guard, took a crossbow bolt to the side. The impact sent her stumbling back—right into the spinning blades!  At the last moment though, she gracefully twisted, avoiding the deadly blades. She surged forward and unleashed a flurry of strikes, two of the blows landing with sharp precision.

Cassian was already moving, rushing to Navrine’s side. His hand radiated divine warmth as the paladin laid it upon her.

Init - PC [HP]; Conditions & Effects; Actions
14 — Doc [03 / 27hp]; Warhammer vs Guard#1, a hit! (9hp bludgeoning) 
    —BA: SW vs G1, a miss!
06 — Chromir [35 / 43hp]; Move, move object (Thorne), move
    —Stone's Endurance* reaction caused the 15hp crossbow attack to be reduced -8hp to 7hp.
    —Then Chromir's damage resistance kicked in, halving the 7hp to 3hp.
    —Only 3hp (instead of 7hp) got through.  Net increase of +4hp
06 — Navrine [11 / 24hp]; (see guard #2's actions first please), Unarmed Strike vs G2, a hit! (5hp bludgeoning)
   — Flurry of Blows, a crit! (10hp bludgeoning)
   — Flurry of Blows, 18 to-hit, a miss!
    —Triggers a reaction from the guard. Parry, increases AC by 2 cause the 18 to miss.
01 — Cassian [33 / 33hp]; drag Thorne, move, Lay on Hands vs Navrine (+9hp)
   — [no need for an athletics check or a grapple or anything, the baron (while unconscious) counts as an object]

*The order of operations to modify damage is Adjustments (bonuses, penalties, modifiers) > Resistances > Vulnerabilities

Init — Name, AC [hp inflicted]; Conditions & Effects; Actions
14 — Guard #1, AC17 [23hp inflicted]; Two greatsword attacks‡ vs Doc, one hit! (12hp slashing & 3hp slashing)
    — This prompts two Concentration checks, first one failed, second one not needed
    — Spiritual weapon drops
14 — Guard #2, AC17 [15hp inflicted]; Two crossbow attacks vs Navrine, on hit! (13hp piercing)
    —The attack pushes Navrine 10' back into a red square.
    —Dex save [DC15] or take 9hp slashing.
    —Then, as Navrine begins her turn in a red square, Dex save [DC15] or take 3hp slashing
     —I rolled both of these saves, both passed ... no damage from the sawblades.

‡I missed the graze special ability of last round's pair of greatsword attacks ... but since they were both nat 1's ... I am fine with handwaving last round's graze as if they did not happen 
---
Beginning of next round ...
Init — Name, AC [hp inflicted]; Conditions & Effects; Actions
17 - Baron Thorne, AC15 [71hp inflicted]; Making Death Saving Throws [1P/2F]
    —The baron failed his death save, and failed one more because he took damage from the sawblades. 

Ongoing Effects
Chromir — Rage, 10 minutes
Doc — Stonecunning (Tremorsense 60'), 10 minutes
Cassian — Sacred Weapon, 10 minutes

The red squares (sawblades) and the orange squares (gears and machinery) are not walls, they can be moved through, but doing so is dangerous.
Dex save (DC15) or 2d8 slashing damage if you enter, or start your turn on, a red square.
Dex save (DC15) or 2d8 bludgeoning damage if you enter, or start your turn on, an orange square.
The characters with the magenta circle around them are on the catwalk. The catwalk is 10' up, and hugs the wall. (characters on the catwalk can be anywhere along the perimeter of the room, in other words, and there are no saws or gears along the catwalk)

Navrine stands her ground and keeps attacking 2nd guard.

Action: Unarmed Strike (7)+5 for 12 to hit miss
Bonus action: Unarmed Strike (11)+5 for 16 to hit miss

Reaction: if attacked: Deflect attack for 8 points deflected damage

Cassian focuses on attacking the second guard as well.

Action: Longsword to hit 8, miss.

Doc feels his energy waving after the massive greatsword hit; but knows he needs to continue fighting.

He feels its best to hammer onwards on the guard in front of him

Action attack and Bonus action bonus attack from warpriest:

To hit 21 for 11dmg
BA to hit 11 for 6dmg; but knowing he cant take another hit he calls upon his gods to help him and it is guided to be a hit (11+10=21 to hit).

(reaction also used; for Guided strike)

Chromir sees Cassian save the baron and his eyes narrow. But for now he has more pressing things to consider. 

If Doc does not kill guard 1, he will throw a javelin at them. If they are dead he will go after guard 2 with his greataxe. 

14 to hit for 9 damage (javelin on Guard 1) or 14 damage (greataxe on Guard 2)

The battle teetered on the edge of disaster.

Above, Doc stood firm, his warhammer crashing into the guard with bone-rattling force. The warpriest fought with all he had, but his strength alone wasn’t enough. The warrior retaliated with ruthless precision, his greatsword carving deep. Doc staggered, vision swimming—then darkness took him as he collapsed onto the catwalk.

The guard wasted no time. He leveled his crossbow at Chromir and fired. The bolt struck true, slamming the barbarian back against a worktable with a heavy thud.

Below, the second guard turned his attention to Navrine, his blade cutting a lethal arc toward her. For an instant, it seemed like the fight would end with her blood on the sawmill floor. But with a breath of focused instinct, she twisted, catching the strike and redirecting its force. The deadly blow never landed.

Cassian stood beside her, blade raised, ready to turn the tide. 

[Next round begins.  With Doc making Death Saves, there are no hero action that occur prior to the opponent's init ... so I will include their actions now.]

Above, the veteran guard reloaded his crossbow with practiced ease, eyes locking onto Chromir. He fired. The bolt struck deep, forcing the barbarian back another step, blood seeping into the sawdust-covered floor.

Below, the second guard fought with relentless precision. His sword flashed between Navrine and Cassian, forcing them both onto the defensive. A sharp edge clipped the monk’s side, drawing a thin line of red, while the paladin took a glancing blow that rang off their armor.

Init - PC [HP]; Conditions & Effects; Actions
14 — Doc [00 / 27hp]; Two warhammer attacks vs G1, both hit! (11hp + 6hp bludgeoning)
    — Later in the round, Doc was brought to 0hp remaining; Doc is Unconscious 
06 — Chromir [22 / 43hp]; Javelin vs G1, a miss!
06 — Navrine [08 / 24hp]; Two unarmed attacks vs G2, both miss
01 — Cassian [27 / 33hp]; Longsowrd vs G2, a miss

Init — Name, AC [hp inflicted]; Conditions & Effects; Actions
14 —  Greatsword vs Doc, a miss! (3hp slashing)
    — This brings Doc to 0hp remaining
    — Crossbow vs Chromir, a hit! (10hp piercing, reduced to 5hp piercing and push 10')
14 — Guard #2, AC17 [15hp inflicted]; Greatsword vs Navrine, a hit! 11hp slashing)
    — This attack would bring Navrine to 0hp remaining, but I assume that Navrine would use Deflect attacks
     —Deflect attacks (13), the entire attack is blocked and no damage is taken.
    — Greatsword vs Cassian, a miss! (3hp slashing)
---
Beginning of next round ...
Init — Name, AC [hp inflicted]; Conditions & Effects; Actions
17 - Baron Thorne, AC15 [71hp inflicted]; Making Death Saving Throws [2P/2F]
   — Thorne passed another death save
14 - Guard #1, AC17 [40hp inflicted]; Bloodied; two Crossbow vs Chromir, one hits! (16hp slashing, reduced to 8hp)
14 - Guard #2, AC17 [15hp inflicted]; Greatsword vs Navrine, a miss! (3hp)*
   — Greatsword vs Cassian, a miss! (3hp)

* The Deflect Attack ability can apply in this instance if you want it to, but I wasn't sure if you wanted to use it for only 3hp so I didn't assume.

Ongoing Effects
Chromir — Rage, 10 minutes
Doc — Stonecunning (Tremorsense 60'), 10 minutes
Cassian — Sacred Weapon, 10 minutes

The red squares (sawblades) and the orange squares (gears and machinery) are not walls, they can be moved through, but doing so is dangerous.
Dex save (DC15) or 2d8 slashing damage if you enter, or start your turn on, a red square.
Dex save (DC15) or 2d8 bludgeoning damage if you enter, or start your turn on, an orange square.
The characters with the magenta circle around them are on the catwalk. The catwalk is 10' up, and hugs the wall. (characters on the catwalk can be anywhere along the perimeter of the room, in other words, and there are no saws or gears along the catwalk)

Death save: 14 (success 1)