It wouldn't hurt, at least.

*he nods to the gallade, who complies without needing further instruction--in fact, Armin may well have seen the same gallade teleporting about the mayhem earlier without Sion accompanying him, which perhaps says a good deal about his training. but while he's doing that...*

It looks like the wall can't easily be cut through, and using more powerful attacks seems risky, so we'll have to search for an alternative.