K, so

Single target: Huton>SE>SF>MUT>SE>DE (unless storms eye is up, then its aeo edge after shadow fang) then armor crush for extended huton

Multi: Doton>Death blossom a few times>Kassatsu>Katon

Boss opener: SE>BFB>IR>GS>DE>KASSATSU>SUITON>SE>TRICKATTACK>GS>DUALTY>AEO EDGE

Then I keep my DoTs up until the boss is dead.