Ok I have been smacking my head against this fun destroying brick wall for two days now, followed all the seemingly great advice on these forums but still no luck. I cannot Kite the Gormak with my Sith Assasin (level 46), no matter what I do (including the threat generating effects) he just ignores me and kills my companion (I have tried all of them multiple times). Nothing i do causes him to pay me the slightest bit of attention while a companion is alive and he just pounds on them until they die then turns on me. Interupts and buffs etc do little except slow the inevitable down a little.
Given the poorly thought out placement of res point and the inability to res inside the dungeon, my last two days has consised of resurecting outside the temple, repairing damaged equipment (purchase new heals and stims if they have been burnt through), run back through temple, the whole bloody temple, kill or sneak past the same 20 monsters, come to Gormack and die within 20 to 40 seconds. Rinse and repeat with various other tactics, same result.
I don't mind a challenging boss in a game where things have been getting gradually tougher but this game consists of ten levels of simple stuff where you only get defeated if you don't pay attention then a stupidly OP boss who comes out of nowhere and makes no sense given the previous difficulty curve.