The Grand Melee

Gaurenteed way to win (assuming no disconects or unforseen glitches)

First off, forget the combo training you did, the comp is often faster cause of ping. Its very unreliable and often just gets you killed. If you try for it, the computer will just do it to you and you will be in a bad way

Start the fight with 3 stacks of Defense
Melee him till he moves to range
Charge his rear
melee till he moves to range again
Repete till victory

Only refresh defense while in melee range, as it shares a cooldown with your ranged attacks, but not your melee. If its on CD when he moves to range, you will be combod and very likely lose

I would say the best way to do this is to NEVER charge. Keep your shields up and melee them. When they move off, throw a shield breaker and immediately chase after them to keep them from charging you. Then continue meleeing them. It takes longer but it was the only way I could beat any of them. Just use 1 and 4 with the occasional 2 as they're moving away. I never lose any more using this method.

Ths works very well. The only thing I would add is that after you charge you will often en up running past your opponet. As you turn to face them there is usually time to throw the shield breaker. Just makes it go a little faster.