Damn, that sucks. One thing you could try (it might take a while and I don’t know if it will fix it):
Go along with the raid the grove quest by telling Minthara where the grove is and betray her at the last minute, siding with the tieflings. I did that in my current playthrough and found it a fair bit harder than just offing the leaders, particularly keeping all the tieflings alive (at level 4). But it’s an alternative good path option, and on completion Halsin just shows up, having escaped on his own (hoping that might override whatever glitch you have).
As you’d be trying it as a workaround, maybe switch to easiest mode temporarily if you’re a lower level and don’t let Zevlor bite it.
Imma definitely try. I did start a new game, however, and got to that point by progressing straight there and taking no detours. Was able to save Halsin with no issue. I am going to go back to that original game and try that out. Thanks for the suggestion. Imma definitely try. I did start a new game, however, and got to that point by progressing straight there and taking no detours. Was able to save Halsin with no issue. I am going to go back to that original game and try that out.
