Vashyron owns, he's awesome. I can't say he's better than the others because I have equal love for all of them.
Easy way to level is to switch weapons around. Beware, it'll just make the rest of the game easier, it's not balanced for level-grinding.
Oh, also, you can switch character positions in the menu. Make him third to go, and put your machine gunner in top position. If Vashyron is your machine gunner, then that is pretty much why he is leveling like a beast. Generally two people will be high level; the scratcher and the main source of direct damage. Third person usually ends up just doing utility/knockbacks and set up for tri-attacks.
Easy way to level is to switch weapons around. Beware, it'll just make the rest of the game easier, it's not balanced for level-grinding.
Oh, also, you can switch character positions in the menu. Make him third to go, and put your machine gunner in top position. If Vashyron is your machine gunner, then that is pretty much why he is leveling like a beast. Generally two people will be high level; the scratcher and the main source of direct damage. Third person usually ends up just doing utility/knockbacks and set up for tri-attacks.