1) Thor should still be too durable, more skilled a fighter, and probably quicker than all 3 of them. I say he takes this.
2) A bit more interesting. And no doubt Ben would be storming into the battle head-first, expecting to do more damage than he's capable of. It could probably go either way, depending on the writer.
__________________ "Oh, listen to Mary Poppins. He's got his crust all stiff and upper with that nancy-boy accent. You Englishmen are always so... Bloody hell! Sodding, blimey, shagging, knickers, bollocks... Oh God! I'm English!"