I am by no means a pro Monk PvPer, but I would recommend to keep Form Shift on an easily reached key. You can keep up three stacks of greased lightning if you time each stance right as to not wait TP. That offers you a quick shoulder tackle into tornado kick of you see a weak runner. Any other time would be the demolish combo first and do sommersault usually near the end of each combo. Though, you can easily weave it as much as possible between each ogcd when it''s available for a quick Forbidden Chakra. If they fight back, you can enter into Riddle of the Earth until you are granted Earth's reply. You can then change to Riddle of Fire and I do believe you continue to have the buff of earth's reply so you take less damage and deal more of it.