Yeah, there are more ways Strange can get Professor X then there are ways Prof X can get Strange. Then again, Strange had trouble against Mastermind's illusions, and Charlie had to bail him out, so it's hardly a cakewalk for Strange. Strange would need to know he's fighting X before the fight started so he can cast the appropriate spell. If X ambushed Strange or they ran into each other at the Quickmart, Strange loses at the speed of...well...thought.
😎 I think that even though Prof X. is extremely formidable in all of the lands of telepaths. He just can't hang with the good Dr. who himself has one of the top minds as far as forcing his minds will upon others. And i believe that the Dr. could quickly use one of the million+ spells that he's without question the master of, and summon up some nice and nasty of whatever he wants, to take Pro. X to any of the many other dimensions he visits, and make X chill out for whatever time the Dr. would deem sufficient per their disagreement of the minds. the Dr. probably got some sort of mystic shield up at all times to not allow telepaths an entrance.
Strange IMO rather easily.
BJG