When you see the Ravager (siege class), you won't make that mistake again. 
Speaking of which, how does the slow-firing beam-of-death sound? I am working on the siege capital right now, and in adition to the usual array of plasma weapons, I would like to give it a sort of a tactical ability which costs power (anti-matter will be replaced with more generic "power" and credits with "supplies" - Xin have no use for money, for example) and thus can be fired only a certain amount of times, but is powerful enough to, for example, rip a minor ship in half. It could be used against ships, but its primary purpose would be to soften up big, tough targets. Like starbases. Did I mention it would be long-range as well?
One of my fondest memories in RTS gaming was the absolute panic I felt when I realised sneaky orcs managed to haul a catapult or two close to my village in the original Warcraft. That thing made your knights go positively splat... I'd like to recreate the feeling with the Ravager... sort of "ohshit, its a Ravager, getit getit getit before it comes too close!"