I confirm that Jana is defeated without straining (not that I really wanted to win), you just need to use skills and everything will be ok, and up to 50% with some luck can be done without skills at all... Her grabbing attack usually misses - about one time in five misses. I have a normal attack hitting 40-45hp, not by 4hp, and double 40-45hp x2, plus sometimes crit... Never had an attack for 4 hp, maybe it's a bug with old save again?
P.S. I was really looking forward to Jana and she is beautiful, thanks for the update!