[Slydria]

I'd say the problem in this scenario is simply that Sear's Cinder tiles are too strong, they can deal enormous damage when paired with push or pull moves. I'd say try dialing them back to maybe more around 25% of the spell's damage instead of 50%.

As far as I'm aware, Intensify Cold's Frostbite with Ice Sheets isn't nearly as crazy because the value isn't nearly as high (LV 50 + 50% Ice Weakness vs Half the Spell's Damage) and Ice Sheets break when moved on unlike Cinders.