[Nitram Draw]

Sounds like you'd have to be into S&M to go up against one with 20 LC's!
I would make it a guaranteed hit ship, ie you can't miss it +200% or something. I would also test it against Starbases, they should Last at least one turn against it, or at least not be out ranged by it.
Maybe even give the hull an accuracy penalty because it's so big half of it's stuff is on the wrong side of the ship/planet.