Setting Other World Tournament.
I bet this battle seemed like a good idea at first, but there is such a major difference in ability here. Barragan doesn't even need to use his Respira. He could just blitz Blackbeard all day if he wanted.
He could keep up with Ace and intercepted an attack from G2 Luffy, he aint slow, in fact going on the Luffy thing he's easily mach 15+. If anything they're probably about equal in speed
If this was a bloodlusted fight I'd give it to Blackbeard for quake spammage
Two extremely cocky people... neither will probably take the other seriously.... Blackbeard would probably allow Barrangan to do something first just because he's Blackbeard(as in it's usually shown in his character)... I'm pretty sure Barrangan will win