Board Thread:Manga/@comment-28516743-20170603033410/@comment-31641135-20170604091646

He only taunted Berthold in the clash of the titan's arc I think at that point Eren doesn't have the hardening power but it's also possible they could have broken her out and it's just not mentioned for the sake of a reveal later on. I think it was just to simple play with his emotions to make Berthold lower his guard.

If anything blades will be useless for the squad against guns and artillery so they could perhaps strength there ranged weapons from the destroyed ships as they props had forms of advanced cannons and that on them that they could use I would imagine. For me at least I think it's more down to who has the most titans really if there going to war Eren and Armin are there only hope so if anything they should focus on strengthening them. A way could be to find out a way to make those mixtures that gave even his powers to use the hardening ability to essentially upgrade the two of them.

Thye either could use Eren coordinate ability to find memories and that to learn how to create it or maybe Hange or Historia would know themselves given time.