When your CDs are up, go Deliverance and Equilibrium, then back to Defiance when you can and Second Wind.

Otherwise make use of Steel Cyclone/Decimate, focus on single target after using a few OPs if you're just pulling small.

It can be finicky at times, but generally just know how much TP you'll need for the next pull and don't end up below that point, then repeat from there.