First things first, you have unlimited ammo, you never have to reload the weapon and all the explosions do damage. The reason this works is because the Angstrum normally has a charge time to fire the weapon however Mirage's clones don't seem to be affected by this. You can simply quickly spam left click and you will infinitely fire rockets until your clones duration runs out. Again you don't have to reload and it doesn't drain your ammo because you're not actually firing yourself. On other players screens they'll simply see you running around doing nothing whatsoever while everything is dying.
Seems gamebreaking to me anyways.