Monet has invulnerability as well, devilsgrin.
She has superstrength, invulnerability, superspeed (she can move at Mach 3), super reflexes, a 192 IQ, super intuition, telepathy, telekinesis, mind control, mental illusions, psi-bolts, psi-shields, and a bunch of other powers. She really is a jack of all trades when it comes to the power lottery.
Molly's stronger than Frenzy or M though - at least physically (Molly is a Class 100 mutant, and her biggest feat was throwing a 65,000 ton skyscraper sized monster (though she did have a caffeine spell at the time) - but even without it, Molly is Colossus level strong plus invulnerable.
M would still win though. She could just give Molly a mental imperative to fall asleep or something.