There was a bug in patch 5, where if you knocked Minthara as temporarily hostile, then did a long rest, Halsin would be stuck asking to kill the three leaders. I think this was because after a long rest, she would be recovered, and the game only checked for the state of the leaders when talking to Halsin.
Seems like instead of fixing it, they bugged her recruitment further.
This was my experience. I had the problem as described last night. Knock out Minthara, killed Dror, long rested, killed Gut and stuck. I went back (tactician) and loaded after Dror, went and spoke to Halsen to get him to join me, juggled some other companions in and killed Gut with Halsen tagging along. Problem solved. No use to honour runs obviously, but seems this is the bug.
