Storm is the shadow nova 1st right?
Do that first so you can interupt the novas. For the rest of the fight have 1 or 2 assigned to interupt. Maybe tank + a melee. Release slate, pop lust burn him. One tank on the drake, one on the boss. Tanks will need to taunt swap once or twice before the drake is dead.
Make sure the raid is spread out during this time for the fireballs which cant be dodged.
Soon as slate is dead, go release time which will mean that fireballs can be dodged and raid damage goes to nothing.
Kill time while taunt swaping time + boss as stakes of MS fall off.
Then release slate and do the same, just keep swaping.
Easy