Dunno if you got your atmas yet but you'll have a much better tanking experience with Razed Ruins and Gnarled Horn.

* Razed Ruins comes from Ironclad Pulverizer in Aby-Misar. (F-8) Some dumbasses are selling this atma for some reason ><

* Gnarled Horn comes from Sobek, you can go in Aby-Misar. (J-11) and just ask the people doing it if you can join for atma, I don't see why they wouldn't.