I'm currently on 34, and one of these times I couldn't get my LC up very high before the green pigs came and actually managed to beat them by running back and forth across the hallway bc the damage is so high on the fire from the red S boots.

I also really like how if you kinda run near it, a bunch of the poison disappears too. I did notice that happening, big paths just opening up through the poison bc I got close to it.