Wombat, you haven't flown a bomber with a Supernova have you. Vastly superior to a Nova or Sunslayer. In just about every way.
Flying around Sirius as I have, A "standard" loadout isn't really there. but averages say...
2 ShieldBusters and 2 Hullbusters, 1 SNova, 1 TrainCD, NukeMine, HvyCM.
or
4 ShieldBusters, 1Snova, 1TrainCD, NukeMine, HvyCM
or
4 HullBusters, 1Snova, 1Inferno, NukeMine, HvyCM (Outcast friendly)
Which HullBusters? Up to you and your RP. BHG have good ones in Reavers OR Buckshots. Outcasts have Krakens. Independants should use whatever their RP allies them to.
Personally, I am still loading-out my Bomber, but I have 1SNova, 1 TrainCD, Nuke, and HvyCD. Looking at 2 ImpDeb and 2 DIAMONDBACKS. I like the effect. I also might choose 2xMiniRazors for quicker fire-rate, but less damage. Sadly, I'm not allied with Outcasts, or I'd have 1Inferno, 1Mini/SNova, depending on what I'm taking out.