Fire damage

[Wheatus Heatus]

I've been trying to unlock Cornelius and I keep failing due to high amounts of fire DoT. Who's the best character to help dispel the massive amounts of fire DoT that can build up.

[Sins]

any healer with dispel magic and healing rain, any mage with rain. anything that applies Wet is going to be super helpful here as any amount of Wet, when applied, wipes out any amount of Burn while preventing a few future stacks.

[malogoss]

You probably played very few runs, keep at it, the perks you'll gain will help a lot.

That said, healers are the best for general dispelling capacity. For dispelling burn effect specifically, Healing Rain is a very good card. Else Dispel Magic is always a good card, burn or not.

Warriors have the card Shake it Off. I usually run 1 copy with any warrior. It dispels 3 for 1 energy when upgraded. Only on themselves though.

Mages can apply Insulate, which will boost fire/burn resistance. They can also play the card Rain, that can dispel all Burn.

Finally, block prevents burn, of course.

Good luck.