I stupidly tried soloing the Kane dungeon and got to the final battle and realized "wow I'm probably going to need a group to do this" So I fled. But here's where it goes mad. The quest had complete and it said talk to Avery and it was all about how I had "beat Kane!" I hadn't even finished the battle, all I did was flee and it said I finished the quest. Really anticlimactic IMO. Please fix this for other people!!
What I did:
Entered The Machine Dungeon solo and did the first and 2nd battles normally Entered the Kane battle and fled after one companion (my Bonnie) died.