User blog comment:Judbud/Firepower/@comment-5294711-20140610004925

I think HP x speed would be something like "survivability", not "firepower". Even moreso when you take into account the Health and Damage system here which allowed bloons to LITERALLY have some firepower.

Plus, say, if bloon A's firepower is twice as of bloon B, it still doesn't mean that bloon A is twice stronger, since there're effects and weapons that affect bloons the same way regardless of speed. For example, the freeze effect can freeze any freezable bloon, putting them to a complete stop, which is much more damaging to a high-speed bloon than a low-speed one, or the sniper, especially a high-layer-popping one. His rate of fire is constant and he can shoot ANY bloon he wants regardless of speed.