When Shadow Tag gets released, couldn't you use a set something like this?
TheBestChandelureEver
@Leftovers
Timid
EVs: 4 Def/252 SpAtk/252 Speed
~Calm Mind
~Flame Charge
~Shadow Ball
~Flamethrower
Switch into a choice-locked Fighting/Normal/Resisted move and set up Calm Minds and...