Man, I just can't do it. I tried to do the Drill Guard thing but it never seems to be there as an option after the spores are implanted. I use David's Fire Shot as often as I can but that doesn't come up too often.The most I can ever do is land one hit on Prima but I can't keep anyone living long enough to keep putting Flavens down to hit Prima again. Is there a strategy guide or something somewhere? Maybe there's just some basic techniques I'm not understanding. I didn't have too many problems up until now but I just can't get through this fight.
I downloaded 1.76 yesterday, installed it today...I was very pleasantly surprised that I was still able to load my saved games. It still took a few tries, but Jason, Louis and David finally defeated the three sisters! Took a few tries, but Jason and Blu defeated them, too! Now Ryu keeps getting slaughtered by them. I'll keep trying. Thanks for responding. I do feel at least a little better now that I've seen comments from other people having the same problem, at least it isn't just me.