The Agir is also available in the premium shop / Armory for doubloons and costs nowhere near $90
My Agir build is below. I use Gunther for the turret rotation and extra main battery DPM once you hit 100 connections.
HEAVY AP: I tend to fire a LOT of AP and get most of my damage there, so I take Heavy AP.
TOP GRADE GUNNER: 11.9km best conceal means I've usually got someone in my detect range - moar main battery!
SUPERINTENDENT: Moar heal!
FOCUS FIRE TRAINING: The mid-range continuous AA on Agir is actually quite good so this helps, plus the other skills don't do much for an Agir IMO
EXPERT LOADER: AP is your friend. With heavy AP your alpha is 9555 - enough to blap cruisers from full-0 in some cases - have your AP ready when you need it.