you may want to start with heavy thrust>phlebotomize. then depending on whether u think he's gonna turn or not take ur opportunity to impluse>disembowel>chaos thrust. after that you do your filler combo True>Vorpal>Full.

Insert you CD's appropriately to buff DoTs and make SURE BfB lands on a full thrust that you've used life surge for. so my opening rotation looks as such...

Heavy Thrust>(Leg sweep)Phlebotomize>Impulse Drive> Disembowel> (BfB) Chaos Thrust> (Powersurge) True Thrust> (Jump) Vorpal Thrust > (Lifesurge) Full Thrust

Save your impulse drive for engaging bosses/catching up, or if u think thats not necessary insert it anywhere in rotation.
Save Dragonfire Dive for AoE/Cleave unless its a single target in which case u insert it anywhere.

On another note..

Dragoon has nothing to do with rotation or procs or any such DPS style. It is purely a priority list...
1)Keep Heavy Thrust up, and Phlebotomize has same duration so use it right after always.
2)Keep Disembowel/Chaos Thrust up (use BfB before Chaos Thrust)
3)If those are both up use filler combo (True>Vorpal>Full), use Life Surge before Full Thrust if you have BfB on.
4)Use your oGCD's on CD, or save for when you know burst is needed. These are what boosts your DPS the most.