Well Psylocke is a very skilled martial artisit she can do it.
As skilled as she is, martial arts can't compensate for everything. Wanda can conjure scores of characters from thin air that is considerably hard to deal with. And that's not counting the other means of offense that reality warping can take.
Psylocke could kill him a number of ways, again she is a martila artist.
1) Martial arts is only effective if you can close upon the target. Psylocke can't fly; MJJ can.
2) Her telekinesis, powerful as it is, is not enough to sufficiently combat, least survive long enough against MJJ.
3) Reality warping can kill her in many ways indirectly, despite her current powers and skills.
Ah. The Kryptonian mental discipline which Superman supposedly combat reality warping. One of the lesser known capabilities, alongside Torquasm-Rao.
There is the degree of will-power/spirit to consider. Which always comes through.
Not really. It really boils down to power and how it's used.
Greg Pak:
"The Sentry's power approaches the cosmic," Pak explained. "The Hulk's the strongest one there is. Can a cosmic level hero withstand the mightiest blows of the strongest one there is? Can the strongest one there is survive a cosmic level assault? You'll have to read 'World War Hulk' #5 to find out."
Wow the Sentry is cosmic level(Well I am not surprised Cosmics are not that impressive)? And Hulk is about to go toe-to-toe with a Cosmic.
http://www.comicbookresources.com/news/newsitem.cgi?id=12365
Well, Sentry easily took care of Terrax and stalemated Galactus, the conditions of the latter scenario wholly unknown.
Despite the hype and the supposed literal statement of "power of a million exploding suns", writers always seem to write the Sentry holding back, making the implication that his power is so great that it can't be used without serious, perhaps counter-beneficial ramnifications. Frustrating to like the character, really. Sure, all this power denotes great responsibility, but this character bores me.
And how does a more potent version Super Soldier Serum grants
cosmic powers? The heck?