The Quest List for the 3 slot gear there are 2 parts and you can find the NPC's at Drifer.
Make sure to complete all Mission List quests first.
STEP 1. Helmet 3socket quest review go to NPC n do it quest, this is continue quest.
after clean all of quest, u can deceide item for ur class
1.carrma - working overtime
2.carrma - calamar's henchman
3.after No3. he wont give quest, so go to Rachel (near entrance drifel? city)
4.Rachel - Mercenary MIA(hard)
5.Rachel - Burnt report
6.Tempess - Ambiguoys clue
7.Tempess - Applied shield(hard)
8.Tempess - architect of sealing shield
9.tempss - request for elgard
10.Suspicious old man -Vashu's advice(hero)
STEP 2. Chest,glove,boots 3socket quest review go to NPC n do it quest, this is continue quest.
after clean all of quest, u can deceide item for ur class
1.carrma - mission review
2.bordou - another attempt(hard)
3.bordou - eliminating the pursuer(hell) - select well ur class part (glove)
4.bordou - quick finish (hard)
5.bordou - relentless watcher(hell)
6.bordou - ready to move in(hell) - select well ur class part (chest)
7.bordou - mission status report
8.carrma - advancing into the shackles of blabla
9.carrma - enemy of elgard(hell)
10.carrma - sad queen of the imperial blabla(hero) - select well ur class(boot)