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ronan has his staff, but not the gem.

arthur got the trident.
fight is on land in vienna.

I am not sure about Ronan. He doesn't have a lot of feats without the Power Stone (almost none, to be honest), but if we scale his striking power off of Drax's other durability feats throughout his appearances, Ronan hits stupidly hard.

Ronan wins

Ronan KO's Arthur, I believe