If you want just raw firepower then your looking at the:

Tactical Escort Refit:
Add: Borg set
front:
Heavy anti-proton cannons 3 slots
Qauntom Torp launcher

Rear
Borg cutting beam
2 anti-proton turrent

This setup gives you 6 weapons shooting at a target on the fwd. pass. then you lock the borg tractor beam on the guy cut him up with Borg cutting beam.

Bridge officer abilitys:
High yield torps
rapid fire
scatter fire
emg. power to weapons
Eng team 1
Sci team 1
Tac beam