I personally don't like starting with Plunge, the animation lock is pretty annoying and on some monsters (like rafflesia in turn 6) it can be just long enough to get the party cleaved.
I prefer Pre-pull Dark Arts -> Unmend(Potion) -> Scourge(Salted Earth + Blood Weapon) After this part I change based on whether I'm OT or MT
-> Hard Slash(C&S + Dark Passenger) -> Spinning Slash(Plunge)-> Power Slash(low blow +reprisal)= enmity branch
->Hard Slash (C&S + Dark Arts) -> Syphon Strike(Plunge) -> Soul Eater (Dark passenger+ Low Blow) = DPS branch