Well if Hood with Mind Gem beat Xavier when he had absolutely no training or experience with using it properly, then Xavier with Mind Gem and some time to learn how to use it should mean he stomps.
WTF? Moondragon, herself an accomplished telepath, only managed to stalemate Prof. X when she had the Mind Gem. The Gems are trash without the backing of the Power Gem.
Odin all day, every day.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.
^ I don't remember that happening. Either way, while the Mind Gem might fluctuate, it's clearly got the power when used right. Hell, when it's used wrong, a non-telepath defeated Xavier outright.
In a Quasar issue during Infinity War. They both fought off each others mental probes and blocked their team mates from each others mental powers. If the Gem was all that, she should have stomped him but she didn't.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.
^ Well, obviously the Mind Gem has proven powerful enough to stomp Xavier on-panel anyway. So it doesn't really matter anymore. Chalk it up to Moondragon suckin ballz.