Lashing tail kick is going up in spiritcost but it seems that you might be able to sustain it. As I don't have the gear, I sadly cannot test it but it might be quite some damage as the item procs will profit from +fire damage (LTK=755%+700% from gyana + 1200% from shenlong). Question is how often do the shenlong proc and is there an internal cd with gyana?
One advantage would bei that you could do damage from a distance with the Spinning Flame Kick rune. Ranged monk ftw :-D