No Mace would destroy Malgus. Vaapad is THE ultimate form for fighting Sith. It uses the darkness within the user and the opponent to strengthen the user. But even without Vaapad, Malgus would be no match for Mace Windu. Just like Malgus is no match for Darth Sidious.
I disagree, I understand that form is very important but I donít think that it is an auto win over experience. Malgus is a master duelist in a time when Jedi vs. Sith fights are common. Mace and Sidious are masters of form in a time when Jedi vs. Sith fights are uncommon. So I think that Malgusís experience gives him an advantage that you not taking into account (at least against Mace). Now I know that Vaapad is a powerful form, but is it really so powerful that no other form can beat it?