well for an optimal DPS i think this and tell me if something is wrong:
1-Impulse>Disembowel>Chaos thrust (for the -10% resistance and DoT from Chaos)
2-Heavy Thrust flank > True thrust > Blood for Blood > Internal Release > Vorpal thrust > Life Surge > Full Thrust > Power Surge > Jump > Spineshutter > Dragonfire Dive

and of course throwing Mercy Stroke when the mob is dying since its an ability :P