I suggest a lightning tool. When clicked, it will spawn lightning. You can hold to do this rapidly. On contact, it will explode in flame. If it hits anything made of metal, it will get hot. Every bolt that you shoot causes the metal to get hotter, until it's hot enough to turn a ragdoll's hand into ash. This also applies with the bullets inside the gun.
I think there should be a "Health leech" Power. To use this power, you can click and hold on one body part until it has no health. Then you click and hold on a body part that is damaged, or use the throw power to use 2x the strength.