Yeah, the Mats are first and foremost the biggest wall of it all. I'll have the time to farm some of them up while climbing up to Rank 100 I guess.
I somehow managed to miss the bit about Brynhildr. I'm not terribly sure what to feel about having a 3rd A-Frame ATK buffer, but I'll keep an eye out for her so I've got the option at least. Thanks for the reply.