Well, at any rate, the imperials have the Tartan Cruiser, which for all intents and purposes is a Lancer frigate (given its effectiveness against rebel fighters). This should be a very common vessel in your fleets, Imperials. There is no excuse for not having this unit, it can take out whole groups of rebel fighters and bombers very quickly and is very cheap, pop cap wise, for the cost to the enemy for their 1 pop costing fighters. The Imperial Ties are not too terribly overpowered because the only place you will see unlimited spawning of them is from starbases, which as a matter of fact the Rebels also have.