I know how you feel, it took me about 3 hours to win this fight.
Mercenery just stun other guard with con missile - easy
PT - use gault and nuke one what gault is targeting - use any shield or defensive buff you have in start of the fight - when the first one begins to heal quell him and when other starts to heal stun him with electro dart and use in the trail to refresh electro dart cd - then again quell or dart who starts to heal first and visa versa another, if they still heal third time use carbonite to stun 1 or both same time.
Tips.
- Use electro dart, quell, carbonite or grapple to interupt heals as PT
- Focus one and try to kill him and then get yourself killed and spawn and kill another one
- Use shield and defensive buffs to minimize hard incoming dmg at start of the fight
- Watch for knockbacks when using quell
- Recommended to nuke from range, because knockbacks can be annoying
- Annoying, but recommended to have On the trail skill always ready when fighting 2 guards same time - 20 min cooldown
. Try NOT to position them closely, because if you do then you dont have chance to quell any of those healings - recommended to use grapple to pull other one away at start of the fight
Hope it help and yeah i lost almost 200k because of this quest