Board Thread:Manga/@comment-28516743-20170603033410/@comment-14745711-20170603123014

Interesting ideas. I suppose a big factor is how much this stuff weighs. We've seen people handeling bits of it, but no large parts that I can remember. If it weighs close to/the same as stone then that may put a serious limitation on its uses, at least for non-titans anyway. I imagine it would also take a lot of training for Eren to produce more complicated things, and we don't know how complex he can get.

Something that interests me is that if Eren were to create armour for the Attack Titan, could he increase its efficiency. What I mean is, assuming Titan Armour doesn't act via a sponge mechanic (i.e. it absorbs and disperses kinetic energy from a blow) the Armoured Titan's Armour is poorly designed. It imitates the structure of the muscles underneath to a large extent, which provide a poor shape for the defelction of blows and projectiles, as muscles are shaped to provide motor function, and to a lesser extent to protect your internal organs. Muscles opperate on the sponge armour mechanic I mentioned, so if Titan Armour follows the same idea then it would make sense to copy muscle structures, but it doesn't seem like it does.

In that case, could Eren create armour for the Attack Titan more remeniscent of a suit of plate armour? Granted, he might want to make some alterations to expand his range of motion a bit (plate tends limit how far you can bend your elbows and shoulders), but assuming Titan armour is solid and works by deflecting kinetic force rather than absorbing it, it would be a better design.

Another factor we should consider, is that its implied that a Titan can only produce so much armour, and the more you spread it out the weaker it gets. The Attack Titan's 'brass knuckles' were much harder than the Armoured Titan's armour, because they were concentrated into a single location. If that's the case, a potentially deadly weapon would be something like a Thunder Spear, but attached to the Attack Titan's arm. If the point is substantially harder than the Armoured Titan's armour, it could punch clean through, and probably skewer Reiner's (or his successor's) actual body through the chest and the nape at the back.

There's a lot of possibilities, and I expect Eren would have done some experimentation in the mean time. I'm looking forward to see if he's got any more inovations when we next see him.