How Far Can This Mega Charizard X Team Take Me? - Pokemon Champions

What appears to be a Charizard Y + Chlorophyl Venusaur sun core at team preview turns out to be an unrelated Dragon Dance Charizard X + defensive Mega Venusaur shell that I can decide which Mega Evolution is better for whatever matchup I'm currently against. How far can that misdirection take me? Join me and see :)