Doesn't Xavier need enhancement to touch every mind on Earth at once?
MM did that on his own, in Ostranders run. Was looking for a single individual, and quickly scanned every human for a specific piece of information.
Anyways, it doesn't really matter as MM should at least be capable of taking Xaviers mental attacks long enough to just knock him out.
The thread poster didn't say the telepaths HAD to keep to telepathy only. 😛