It would be the easiest way for the player certainly, but I just can't imagine Minthara begging for her life after defeat. Even if the party would grant her mercy, I 'd sooner see her swallow a drow cyanide pill than surrendering.
Well, nowhere did anyone state she should be
begging for her life after defeat. I imagine she would become even more hostile after being defeated. I was thinking more along the lines of her fate being in your hands. They could give us an option to kill or spare her, but not just let her live randomly like the way it's currently implemented.
No, it's only after going back to her general, thinking she was doing well but not able to get the artefact because the goblins are too stupid and unruly to defeat the druids. Retreat to base, reorganize and re-attack, but instead find that she is betrayed, humiliated and tortured. Only this would sway her and get her to ally with anyone fighting the absolute.
Yeah. In my opinion, her "running away" is not entirely out-of-character. Minthara has a high survival instinct, it's been proven several times: 1) She claims she prefers exile to death, 2) She said she doesn't intend to lead a suicidal charge against the druids. Both those points are enough to convince me making a "strategic retreat" is not out of the question for her, especially when she has been brainwashed to think serving the Absolute should be her life purpose.
Maybe a solution would be to put a message in the quest journal to confirm that Minthara will be recruitable when you find her again. At least then the player knows that the plan was correctly executed.
I think this would break my immersion tbh. But everything depends on how Larian would execute it, or if they would even consider improving her recruitment at all.