I too have noticed he doesn’t always kill the weakest. Sometimes it’s just the first person in your lineup. It’s weird. Not quite sure how it works.
I’ve been running Extreme missions lately. He kills my Flatline who is almost at full hp while keeping Hivemind who is at half health alive. I’m not sure if they have tweaked the A.I. interaction to reduce Kurtz comps for Extreme, but test it yourself and see.
(So it may not always follow the HP rule as the weakest ally? or that’s a nerf to his effectiveness in Extreme missions)
this is the exact issue i face… my flatline gets executed even though as you mentioned, she has way more heslth than the other heroes… wasted lots of stamina bcos of this