Gimbled beams and multi-cannons. Makes short work of just about anything.
Agreed... I tried to love the cannons (and particle accelerators), I really did, but I found the time it took to line up a good shot left me vulnerable and not dishing out reliable damage otherwise.
Word is from the Devs that Power Plant kills will not be an insta-kill on ships in the next update. It has a chance of insta-kill, but it can also just shut down the ship and force the player to initiate a reboot. That means ultimately dishing out hull damage might become the preferred method of combat.
My philosophy is this - my ship can handle the C3 beams - keeping one fixed forces me to be more careful about when I fire so I'm not wasting energy, but the other one being gimbled means I'm probably going to hit half the time anyway. Against smaller, more nimble ships the gimbled will end up doing most the damage, and that's fine. Against larger ships I'm going to hit more reliably with the fixed and it dishes out a fair bit more damage so it's worth it.
If a target is close, just pour on the multicannons. Once they get further away, back to beams, even if their shields are down.
So far I haven't had serious energy issues, though I do have to swap pips now and then. Does make me wonder if C3 pulses or bursts might be better for that reason.
The experimentation is endless...