What weapon loadout do BoP users use at T5? I am unsure of what weapon types I should throw in the Front 4 weapons slots.

1 Heavy and 1 Normal Dual or both Normal Dual Cannons?

I would say dual heavy. That is really a good weapon layout for a BoP. I do sometimes add the turret on the front for PvP just so I have at least 2 or 3 weapons pounding my target's shields/hull. I like to keep hitting the shields to beat them down for when I turn about and come in with the big guns. The more I keep the shields down, the faster I get to the hull and the quicker the target uses up his/her BO skills.

3x Dual heavy cannons + Quantum torpedo launcher front.
2x Tetryon turrets rear

Torp High Yield 3 FTW

Excuse me, wrong slot, I use Omega 3 in that slot.

Fore
- Dual Heavy Cannons
- Dual Cannons
- 2x Photon Torpedo

Aft
- 2x Turret

Tactical: High Yield 1, Security Team 2, High Yield 3, Rapid Fire 3
Engineering: Emergency Power... to Shields 1, to Auxiliary 1, Boarding Party 1, Engineering Team 2
Science: Tachyon Beam 1, Polarize Hull 1, Tyken's Rift 2

Necromance much?

Lol @ boarding party and two torps.