Question... isn't emma frost in her diamond form psioncially impervious? hence the reason she had to keep her diamond form?
if so... emma walks up to the cuckoos in diamond form and punches all of them in the mouth.
__________________ Quotes from Hia8:
"I claimed that the science is sometimes faulty."
"You don't understand. This is fiction. That means none of this stuff really happened."
"There is no writer to purposely ignore a character's natural ability just because it suits the story."
"in some cases because the writer knows that Character A will dominate Character B easily and refuses to allow this to happen for the sake of the story."
I'm trying to think of someone who might not be as directly powerful, but specializes in psychic defense. Sage was able to boot out the Shadow-X Xavier (who was really the Shadow King, but same difference), so she might be able to despite being by far their inferior in telepathic strength.
Sage might do it as you say. Her defenses are formidable.
Selene and Sinister come to mind.
Magneto is a latent telepath and could at least hold them off for quite a while.
Psylocke could have a shot but I doubt it, don`t know what is the status of her powers at the moment anyway.