Gladiators are known as one of the most powerfull jobs in PvP mode. They can deal high damage with their useful combos.
Dealing Combo's is a simple task once you get used to it. Though they gotta be quick after a combo is done, a gladiator isn't the fastest. Timing is a big part to. Timing depend on your enemy, is he/she quick, slow? or whatever. Just try to get a great knowledge about your enemy. Having a great knowledge makes its much more easier.