Board Thread:LOC General Discussion/@comment-68.109.192.123-20130213215347/@comment-5662406-20130214133559

I disagree with the posts above to some extent. There is a need for PM'd ATK commons when battling raid bosses. You can save a ton of ATK power when battling low level bosses, as well as when finishing a boss with very little ATK left.

With that said, you should only PM PWR 2-4 commons, because, as stated in the previous posts, junk rares such as Balrog, Lindworm, Timber Dragon, etc..., provide just as much ATK effeciency as higher rares like Deus.

Best way to find what commons provide the best effeciency is just look through the gallery.