Everybody except for Cloyster is walled by Chansey.
Replace heliolisk with her, as she can benefit much more with chlorophyll and quiver dance with sleep powder
She only gets grass attacks and hidden power. Lilligant has worse coverage than leafeon, so you're walled by half the pokedex. Eliminating her counters means beating her opponent. And you only want to carry so many speedy sweepers who gets checked by talonflame (you can do what some volcoronas do and carry hp rock).
Sun benefits from having hazards on the opponent's field, so you'll want an SR user. I know you're using Char Y, but Char X is probably a better drought team pokemon. While he doesn't put sunlight up, the offensive presence he gives you just from having sunlight up is immense.
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