"Can't one shot her with art strike at last tile 3 stages and only that makes her 'not-so-vulnerable' as you need to make 2 shots."

I did actually mention this to them in my reply. As far as making changes go, though, I'm hoping most people didn't splurge on cores yet. I bought one set but am waiting to see how things go (via calculations I think I'll be fine to finish one and get 1 copy of the other, especially if they do tweak it).