hmm... if it takes so long to perform a basic attack, and it's a late game weapon, is the energy reduction really needed? and I feel that this weapons should be better if it does have the energy cost... of course, this weapon is not in the game yet, and I may be misunderstanding something, but it seems slightly underwhelming to me :/
and also, yeah, I suppose you're right, it wouldn't be very good for dealing with jetpack bots because of how fast they are... but I feel that they would still do fairly decent against hammer bots =P