It's funny that you tought that, because all classes are mostly the same in that regard because of the Global Cooldown.
MNK and BRD are push button > wait for GCD > push button.
Mages are push button and wait for GCD while casting > push button
That is only true in the solo content (which is quick and easy). In the dungeons you'll have to play the job at its fullest to be able to deal high damage and you'll be at the enemies's backs 100% of the time. If not, either the tank is not doing his job or you are attacking the wrong target.
In fact, when you get to higher levels on a Bard, you'll stand still most of the time, while a Monk has to move much more in order to alternate between flank/back.
Also, to avoid any confusion, remember that Pugilist is PGL.
PUG means pick-up group, and a lot of new players think everyone hates pugilists because we always complain about pugs