I'm firmly in the 'kill it with fire'-camp in regards to Minthara. I do appreciate making the baddies harder to Fight, but I do think, that Ragzlin and Gut should get some love in the armor department too. Gut could have a special robe giving her some special ability or something like that and Ragzlin as the war leader should have better armor too.
At least Minthara has the amulet of misty steps. She strangely doesn't use it in fight, but I would put that down as an AI problem. Theoretically she could at least be very mobile with it.
I wouldn't mind better armor stats for her armor, since I like the look and do want to wear it with my rogue. But you already have access to better armor ( not so nice looking though) at that point in the game
