In my third run I play a cleric that for her background has knowledge that allows metaplaying so concious of the future battle with Dror Razzling (or whatever is his name) she decides to heal the mindflier in the crash site. So she leveled up to level 2 so her goddess granted her the cure wounds and heal spells. I tried cure wounds, brought the hit points of the mindflier from 3 to 14. He stood in his own feets then he died, by the way triggering a dialogue line that for my new toon is out of character.
Well I suppose that they couldn't gave so many options but is a bit weird that we can heal Finral, that we can heal Astarion, but not the mindflier.