I finally figured out how to have my cake and eat it too; have Minthara and still slaught the goblin children, that is. Have to spawn in an Act 2 Minthara in Act 1 and make her go to my camp, this flags her as a companion, and thus revivable, and then I agree with Halsin to slaught the goblins, kill her btw, and then revive her. Perfect ending, right?