You can target them as soon as you see them. Dont stay to close and you have a very good chance. They move very slowly. But they are difficult to hit. You should always have an officer with Cannon: Scatter Volley I or Beam: Fire at Will I for these situations.. And one finger ready at Evasive Maneuver. Then they shouldnt be a problem.
Yeah, and you need something to get out of tractor beams. Polarise hull is ALWAYS useful.
If you have all of these, the Romulans should be no problem at all... Nada. Remember to laugh at them to **** them off even more, before you destroy them.
You don't need a ton of gear to beat a warbird. All you really need is lots of Har'Peng torpedoes and lots of time. Fly into range, drop a Har'Peng on him, fly out of range, spend the cooldown time shooting down incoming plasma torpedoes. Rinse and repeat.
Never, ever get close enough (I think it's 5KM) for him to pin you with his tractor beam, because then you truly are toast.
It's not a lot of fun. And it takes a while. But it always works.
Column of yellow miss miss miss miss miss
Once you get high enough, you can go back to fight the Romulans again in your T5 ship.
It's quite satisfying to turn the tables on overpoweredness... :p
I've found the best counter to the Torps Fedside is to use AoE attacks, slot an Automated Defence Turret and/or sit in a Warp Plasma Cloud. The Vent Theta Radiation Console (available to Feds via the Lockbox Reward Packs) can let you do this if you're not an Escort, don't have a high level Engineering BOFF slot and weren't lucky enough to grab the Digital Deluxe Edition of STO.
If you're KDF and happen to be up against something with Targetable Torpedos, there's always the Aceton Assimilator from the Draguas Support Vessel. It can basically neutralise Heavy Torpedos, and sucks away a good portion of the enemy's energy at the same time.