Iorythas draws his bow as they step into the room, moving off to the side as he attempts to find a good vantage point to fire from.

Real will do usual prep work by casting two spells (assuming he had time as they approached etc...).  He will cast armor of agathys at level 8 spell for 40 temp HP.  he will also cast aid on himself and Iorythas and Tykoris at level 7 for 30 increase to max hp.

The angel ignores you for the most part, continuing her ritual.

Real is tired of waiting.  "Tempani it is time to end this madness!"  He will use his bonus action to throw Hexblade's Curse on Tempani and will use his action to put a Vow of Enmity on her. "You will stop now or regret the outcome!"

Roll initiative then.

Tempani 22

Saralyssa: 15

Real initiative: 14

Inititiative: 27

Tyrkoris 4

Going to give just a bit longer for those who have not posted initiative yet.

It appears Bjorn is no longer with us...

Initiative order is:
Iorythas
Tempani
saralyssa
real
Tyrkoris

Iorythas you are up.

Iorythas will take two shots with his longbow at Tempani as quickly as he can.

Attack 1: Attack: 18 Damage: 28

Attack 2: Attack: 24 Damage: 27

Quote from DarthDrizzt >>

Iorythas will take two shots with his longbow at Tempani as quickly as he can.

Attack 1: Attack: 17 Damage: 25

Attack 2: Attack: 20 Damage: 24

 Both arrows miss the angel, who turns her attention onto the group now fully.

Tempani magically teleports next to Iorythas. She then attacks twice with her greatsword.

Greatsword. 30 to hit, reach 5 ft., one target. 23 slashing damage, plus 20 psychic damage.
Greatsword. 20 to hit, reach 5 ft., one target. 22 slashing damage, plus 14 psychic damage.

Extra crit damage on second strike...

12 slashing damage, plus 25 psychic damage.

Saralyssa casts crown of stars  7 motes of light springing into existence around her. She sends one hurtling towards the angel.

Attack: 22 Damage: 29

Quote from DragonDenn >>

Saralyssa casts crown of stars  7 motes of light springing into existence around her. She sends one hurtling towards the angel.

 

Attack: 22 Damage: 29

 Saralyssa's blast hits the angel, staggering her.

Everyone else can now take their actions.

Tyrkoris will try to stay out of reach of the angel, if not already in it, and cast Beacon of Hope.

Real will attack (twice with attack action from paladin extra attack) using his staff of power, he has advantage from Vow of Enmity and 19 or 20 is a crit from Hexblade's curse, also can roll 3 dice on advantage from Elven Accuracy.

ACTION:

#1 attack rolls: 21, 24, 16  (much to resolve with paladin smite possible along with power strike from staff of power so I will resolve things below after seeing if there is a crit or not.)

#2 attack rolls: 25, 32, 26  (much to resolve with paladin smite possible along with power strike from staff of power so I will resolve things below after seeing if there is a crit or not.)

BONUS ACTION: Use 2 sorcery points to quicken booming blade

attack rolls for booming blade: 18, 22, 21  (much to resolve with paladin smite possible along with power strike from staff of power so I will resolve things below after seeing if there is a crit or not.)

So resolving damage from the above attack rolls:

#1: final attack roll of 31, if this is a hit then damage is 11 magical bludgeoning, add a first level divine smite for 10 more bludgeoning.  Add power strike from staff of power for 4 force damage.

#2: final attack roll is 32 which is a crit (nat 19 roll).  Damage is  13 magical bludgeoning, add a fourth level divine smite for 49 more bludgeoning.  Add power strike from staff of power for 8 force damage.

Bonus booming blade final attack roll is 29, if this is a hit then damage is 10 magical bludgeoning, add a first level divine smite for 11 more bludgeoning.  Add power strike from staff of power for 2 force damage, 20 thunder damage from booming blade and if Tempani moves between now and the start of Real's next turn another 13 thunder damage.  

Hope that was clear.

So if I calculate that correctly then damages are (assuming no resistances etc..) 21, 77, and 31 with 19 more if Tempani willingly moves.

Quote from Laserwhit >>

So resolving damage from the above attack rolls:

#1: final attack roll of 31, if this is a hit then damage is 13 magical bludgeoning, add a first level divine smite for 6 more bludgeoning.  Add power strike from staff of power for 2 force damage.

#2: final attack roll is 32 which is a crit (nat 19 roll).  Damage is  18 magical bludgeoning, add a fourth level divine smite for 49 more bludgeoning.  Add power strike from staff of power for 10 force damage.

Bonus booming blade final attack roll is 29, if this is a hit then damage is 10 magical bludgeoning, add a first level divine smite for 10 more bludgeoning.  Add power strike from staff of power for 1 force damage, 10 thunder damage from booming blade and if Tempani moves between now and the start of Real's next turn another 19 thunder damage.  

Hope that was clear.

So if I calculate that correctly then damages are (assuming no resistances etc..) 21, 77, and 31 with 19 more if Tempani willingly moves.

 all three of your strikes hit, leaving the angel sorely wounded.