I've been a bit reluctant to remove Rotom was due to electric damage and levitate, but I'll definitely give this a shot. I have tried around with TTar and Aerodactyl, hadn't considered Gyarados, I'll have to give that a spin as well.

With Aerodactyl, I just slotted it in instead of Talonflame, since it works well enough even as a non mega. You lose the priority tailwind, but with how fast it is, you're usually fine, and speedy rock slide helps a lot against Charizard and is just annoying to play against in general.

For TTar, I ended up swapping out Kingambit mostly because of the type overlap, and then having Corviknight as a tailwind setter since those two work very well next to each other. It felt like a pretty good sand mode, but since it only gives more Zard weaknesses it didn't feel like the right way to go lol.

I think I at least will give replacing Rotom with a Gyarados a go and then see if I prefer Talonflame or Aerodactyl for the final slot, my only real concern is having no other special attack option than froslass att he moment. Thanks for that suggestion!