Oh yeah, I was horribly underleveled for this fight. Plus, I never noticed until afterwards but I had a ton of agility boosting cards I hadn't used yet and would've helped me address the number of turns she was getting before I could react. I did get lucky on this run and was able to just about keep Seres up while Eileen and the other party members were struggling free. Took me a long, tense time, but I did manage to just barely beat her. Other than the occasional beef gate of a boss (to be fair, this has been the only one so far) I've been really enjoying the expansion. Amazing that we got so much new content for free!