I usually start the fight off by casting TBN on the MT and Dark Arts. Right before the boss auto attacks the MT, So it'll pop and give me Delirium.
Then HS>Bloodweapon>SS>Salted Earth>SE>Plunge>HS>DA>SS>DA+Delurium>SE>DA+Carve&Spit>HS>DA>SS then what ever you feel like.

100% positive there are more optimal ones out there. For example, ones that align with trick attack and other buffs, and that are fight dependent.