not a bad idea to use hover boots like this. I might have to try something similarly out, because once you get a fire started as long as you add more fuel it will continue to burn.
I honestly haven't used this yet, so I don't know how much the fire spreads. You could maybe utilize the enemy heat source mechanic, but that seems like too much work. If you need more fuel to keep fire going, that may be a small issue. R&S