*Staggered Cannon Barrels however will, armor really does give you "hilariously high durability" against missiles (for a time), obviously beams, & mass output but weak cannons.
a 51x51x51 of adv, hell, with every single block individually shield injected, Ion supported & Piercing buffed can be turned into slag by Ion weapons with the tiniest understanding of schema math (and not the fuzzy broken parts, the purely intended "this is how weapons work" parts)
You need shieldage, you need RECHARGE, meaning you need power, meaning you NEED your volume, this is where you put blocks that do things. Armor is incredible EHP for its cost yes (almost 10 HP per credit spent in fact). But it does NOT supply all that to your AHP, and it does NOT cover & buff every part of the ship like capacitator & recharger together does.
Armor protects shields systems protects AHP protects armor, thrust protects everything, and your weapons & power banks make your tankiness actually matter. I'm not saying I have the perfect ratios, I've been all over (almost entirely armor based, entirely docked recharge based, heavy layered modular armor on a systems tank, and pure capacity, w/e), but the one thing I can tell you for absolute certain is that the smaller you are, the more surface area compared to volume you have, and if you're surface is all fancy armor it can easily outweigh the actual insides. Then a same mass ship comes along who spent that weight on weapons literally 2-3 times as powerful, or recharge that your limited systems can't break. Think of a pirate station, those can take some hits compared to a ship its size right? because they have fuck all systems to actually hit and you're chewing through mostly armor, right?. They also can't destroy anything larger than an Isanth, or even properly power their mediocre weapons. That's armor for you.
Basically weight sucks so much more than people realize. It's not what you have to sacrifice for the weight, it's what the competition DOESN'T Sacrifice. Every block of armor is making you a larger ship with smaller guns, less power & weaker shielding. Necessary to an extent to survive alpha damage, but don't forget it. Or you'll just end up honeycombed by the follow up delta damage.