Vallite guard elite

Undead fortitude when this creature dies roll a con save dc 5+ incoming damage  on a successful save they come back with 1 hitpoint unless it’s a critical or radiant damage for every time you pass this save the dc is increased by 5 

formation a villite elite gets +1 ac for every other villite elite within 5ft of him this can go up to a maximum of +3

multi-attack  
the vellite elite makes two long sword attacks 

Long sword Melee Weapon Attack: +4 to hit, reach 5 f, one target. Hit: 6 (1d8+2) piercing damage, or 5 (1d10++2) piercing damage if used with two hands to make a melee attack.

hand crossbow 

Ranged weapon attack +3 to hit range 20/60ft one target. Hit:4 (1d6+1) Piercing damage can be fired as a bonus action if In off hand