Armorer

Arcane Strength. the armorer can choose to use its intelligence to make attack rolls instead of strength or dexterity.

Siege Expert (juggernaut). The armorer deals double damage to objects and structures.

Sculker (prowler). The Armorer can make attack rolls while hidden and not break stealth

Multiattack. The Armorer makes three attacks. with either its blasting gauntlet or its shocking gauntlet.

Shocking Gauntlet (juggernaut). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d8+4) bludgeoning damage. plus an extra 4 (1d6) lighting damage. and a creature who is hit by this attack loses its reaction until the start of its next turn. 

Blasting gauntlet(prowler). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d8+4) force damage.

Spellcasting. The armorer knows the following spells, from the wizard/artificer spell list. Spell Attack +7, Spell Saving DC 15:

Cantrip: message, light

(1/perday cast at 3rd level): magic missile, shatter, lightning bolt

Shifting Armorment(recharge 5-6). The armorer can switch between the prowler or juggernaut form of its armor, when it does so each creature within 5 ft of the armorer takes 4 points of lighting damage. 

Arcane Disruption (prowler). As a bonus action, the armorer can take either the dash, or hide. 

Infused Shield (juggernaut)(2/perday). The armorer can gain an extra +5 to its AC  against an attack the armorer can see.