Can I beat x3 difficulty with ONLY fire damage in Boosted Survivors?

[@mq8858]

I love getting an epic armor and/or regeneration boost, makes you feel so much more secure early on. You go from losing a third of your health each attack to a percentage, not quite invincible (especially if you get surrounded) but tanky enough that you have time to react to taking damage. It's not flashy, but it makes you feel like a beast once the enemies stop feeling scary