To buff armor the best right now, I think some of the Armor-boosting Hull Mods need some tweaks.
1) The really good ones (Heavy Armor, Reinforced Bulkheads, ect) are fairly high-up on the tech tree, requiring a lot of investment to get.
2) They cost a good bit of OP and skill points while STILL having pretty big disadvantages (Heavy armor decreasing maneuverability, for example)
3) Some give too minor of a benefit for their OP cost, currently (Automated Repair Unit is a big offender here)
Tweaking some OP costs, putting some at lower skill ranks, and possibly taking out or reducing some of their disadvantages would be the way to go, IMO. Regenerating armor should be ship-specific system, if anything. Otherwise capital ships become ridiculous and could literally just wait for the enemy to run out of ammo on their powerful armor.