I had the belief that the devs didn't know what to do with MnK, until I played PvP Mnk.
PvP MNK's a well better designed job than PvE MNK.

Shoulder Tackle gives you one stack of GL each.
Form GCDs give you chakra.
Axe kick is an AoE OGCD that gives you GL stacks the more enemies you hit with it.
Six sided star gives a GL stack and chakra

And because you have so much GL stacks, every burst window is dumping it all on Tornado kick, building it up immediately, and then dumping it again in 4 GCDs.