Hm, I might have to look into Cytos for some of my ships. Thanks!
I know this is the common understanding, but that's not been my experience - regarding shield damage at least. For the module vs hull damage issue, I just consciously aim for not-modules. It's a litter counter-intuitive, but it works mostly, and the hull damage is pretty great.
Maybe I'm just expecting too much from them vs shields, but they always seems very underwhelming compared to plasma or beams. It could well be that the engineering comes into a play a lot here too, and I'm judging long-range rails doing essentially stock damage vs efficient or overcharged other weapons. But even when it's long-range rails vs long-range beams, both of the same size, beams always seem to do better vs shields, regardless of what the numbers claim.
I don't completely agree, cos I find them very effective at shield stripping, but it's rather moot, cos their role isn't really as damage dealers. They have two of the strongest special effects (feedback and super pen), so think of them as applicators of those effects and you'll never have ammo problems either.
In the case of an 8A cell bank for example, on a T10, I think that's over 2000mj (can't remember off hand) for two hits from a small hardpoint. Every single one of my ships has at least 2 feedback railguns, cos if you let someone get a big cell off, you're back to square one.