couldnt vulcan just, ya know. suck off his insane amount of exploding suns power and turn it back on him? using his enemy as a constant source of energy while fighting him? and if sentry tries to pull that 'force the void' crap he did with that chick adaptoid vulcan could cut off the flow. and just use what he has to finish the job.
then again to defend sentry, gladiator did crack vulcans head and **** up his eye. but i still think vulcan can win this either way.