Mk 12 jem hadar set on it with polaron beams and bug ship pets. That said its not a cheap option. You can run it with all romulan weapons with embassy consoles and scorpion pets to great effect as well. Honestly in the end both set ups are probably within 1000 dps of each other... and either way VERY high damage.
Carriers are by nature not amazing ships in pvp as they have low speed and therefore low defense. As a klingon you could easily turn the dread carrier into a fairly powerful drain build with syphon drones and an energy syphon.