The energy module is an awesome addition to the classic piranha build to give back energy after sneaking up with the ghost. The low HP is not an issue considering the huge damage boost, good block placement and high fire rate. I won against a meta mega smg legend ion hover while a mega rail was shooting at me.
The propeller underneath in the front is my new technique for putting hovers on cam PLUS tilt to keep them level and close to the ground. Works great for mortar hovers.