Hmm your right, it would sort of jack up the black/white mana meter mechanic! And maybe to keep it more manageable and not too complicated it would be something like this:

Perhaps scatter >> Verwatera (White)
Scatter >> Verblizzra (Dark)

Just to add to an elemental AOE to boost meters faster rather than Scatter / scatter spam

Then add a non-elemental ancient like a AOE finisher Verruin... might be taking it too far here lol