Viper wins this one. I see Buggy and Wapol having a comical fail-battle, but Buggy will win. He always pulls through somehow.
I believe Wiper can get a hit on Buggy quite easily, especially since Buggy isn't that much of a fighter, while the entire Wiper's life was a non-stop battle from his childhood. And he showed quite good skills not only with dials, but with actual combat and he was damn strong physically, so he would easily dominate both Buggy and Wapol. They should be like a joke for him.