Magik w/ prep destroyed the Elder Gods. Plus you have Xavier, Hope and Scott.
This version of MM can't even mindrape from a distance. He needed physical contact to mindwipe his teammates. Hell fire might be the best way to deal with him or maybe time trapping.
Jenny is powerful but still inexperienced. Apollo busting through her shields almost k.o.d her.
If they have doors the X-men have access to time travel, Limbo and its endless armies.
Danger might be able to hack into their systems like Grifter did and mess up "doors".
Midnighter has trouble reading magical opponents. So an army of demons taking him on might be the answer.
Legion might be on the island too.
Magik and Pixie and always bfr jack out of a city.
I am not sure how this team would also fare against Emma, Betsy and Xavier combined.