Original Divine spirit and all, it's going to be a very tough sell if they take this one down in any half-assed manner. If they end up doing it wrong then something that should be in the top tiers of power would end up looking weaker than Caster's summoned Elder god in Zero. Protea is probably weaker than it was originally by being shoved into a servant container much like the other god types in CCC, but it's still a monster beyond all reason and limit.
Only way I can see them taking it down that wouldn't be too lacking is if Tamamo combines with her other tails to form Megazord Amaterasu, so they can have a giant battle.