Janus,
Well, once again not to spoil you, but Lucas has said that when Anakin turns to the darkside, he's the best. He's more powerful than everyone. If he had Maul's assistance, I think Mace and Maul would kill one another and Yoda would go down in a tremendous battle against Anakin.
Obi-Wan's your favorite eh? He was always mine too. HE had the roughest spot to be put in during the saga. He trains a boy, who kills off their order, and then he has to duel him to the death, twice!
I think Mace and Maul would kill one another
Mace and Maul tie? Are you kidding me? Mace is one of the most powerful Jedi ever, probably second best only to Yoda. Sure Darth Maul wields an awesome weapon and fights in a dazzling style, but just because he wields a double-bladed lightsaber and jumps around like a kangaroo on angel dust, it doesn't necessarily mean he is THAT powerful. After all, he was still an apprentice.
Maul would probably put up a good fight, but Mace will definitely walk away with this one.
I think Yoda can hold Anakin off long enough for Mace to finish Maul off. When Yoda and Mace team up against Anakin, I doubt Anakin stands much of a chance.
Yoda has more skill than any Jedi save for Anakin, so he could beat Maul still.
Anakin, even if he was robot would win because Vader is just too hard ass.
Mace would win because he's able to fight off Sidious for a while, and Sidious would slap Maul around.
Obi-Wan, of course he would win. He takes out Grievous and dark Anakin in a span of a couple of days.