@ TheArchitech; the Fire Dragons are easily one of the most powerful anti tank units in the game, and the best choice for the Eldar. They'll need a falcon or a wave serpent to ride around in though, they'll get shot down if they're on foot. I'd say get a squad of 5 in a falcon and you're set to kill just about anything. Just shy away from infantry as they don't have the number of shots to take them down