Nomad cannons? Bleh, Solarises would work better for you, RP-wise.
As for the missiles, ALWAYS get a combo. Dual cannonballs suck ammo and are terrible for hitting.
You need a Cannonball/Sidewinder or Cannonball/Firestalker or Sidewinder/Firestalker
Mounting a missile combo and/or a torp [razors included], have debs as your guns. Kill shield, fire missile, dead player.
A way a lone a last a loved a long the riverrun, past Eve and Adam's, from swerve of shore to bend of bay,
brings us by a commodius vicus of recirculation back to Howth Castle and Environs.