Make the individual shots hurt less, not more, than a luci.
Maybe around 10 damage per ammo.
Add an overcharge.
Add a secondary fire, for that last 1 ammo you sometimes have left.
10 hp is pathetic for a bile dretch, a stray shot could take one down.
And someone really should get working on that firefly model. If I had a mac modeling program (not X11), I would do it myself.