I've only been playing this game fo about a week, so sorry if this is s noob question.

I was beating the illu expert quest, though sometimes I had to res near the end. Then yesterday I tried it, and died on the first mission, then had to res 5 times versus illu. She kept spaming 4k dmg attacks, like she never did before. I didn't make many changes to my team. I put illu as my main eido, replacing prison of ice, disaster, and used asmund as my soul, replacing van helsing.

What happened? Did they make the quest harder, is there a penalty for using illu as an eido against herself in a quest, or was the change to my team more drastic than i realized?