Personally im going to be going with
/cast [@focus] Chi burst
Prefer to have my mouse hovering over grid, I use a mouse over macro to set focus before a boss fight.
Edit: Hey EGT, Could we get a list of all the spells Mistweavers will/can use. Since it's a guide in future if someone wants to try a monk out it'd be good to list each useful spell and the situation their primarily used for plus a ranking on how useful it actually is.