wait...u using Joan/Andromeda with Black propaganda? no B frame debuff? as i recall, Typhon fight basically need to stay alive and save up burst, after that put all debuffs up when she's in rage and burst her into stun...during her stun period is ur dps window since she's unable to dispel those debuffs for few rounds(i got dark amon to reduce rage bar and prolong the stun period)
I just trying to point out Amaterasu is good...because of skill not the stats and using Beelz as example.....if a Hime with 3 awesome skills then u probably need to prioritize her unless there is a Hime with good skills + same element
as for assault skill, if it's hard to see with the naked eye which mean it just a slight difference that does not matter