2 pulse, 2 quantums, level 4 comp, completely remove transporters, put that mass into armor, then just upgrade the core 1 set and fill in your mass with 2-3 up on impulse, and everything else on thrusters. Its invinceable. For fun, I set one like that against a warbird, me in the defiant. I never even took hull damage. Admittedly, the romulan AI needs work, but still. That's pathetic.
Alexander