If there's one thing Deadpool is, it's unpredictable. Even the greatest telepaths in the world can't begin to dig into Wade Wilson's jumbled up mind. It's also proven helpful when fighting Taskmaster, who is able to mimic the fighting style of anyone he faces.
Deadpool's inconsistency makes him hard for anyone to
gameplan against. This could pose a problem for someone who prefers to use a calculated approach like Deathstroke.