Battle Class room = Shadow Rath Castle?

First of all, theorem in general is pointless and stupid. There is no concrete evidence. Second of all, they had to use somewhere for the battle class to be held, doesn't necessarily mean it takes place in the actual Shadow Rath Castle. Through DevCAT's eyes they'd rather create new areas for more important things than a tutoril-type area most people won't do because they know most people are foolish enough to ignore battle tactics... But to be honest, all missions that aren't in Avon are considered Shadow Missions. Even the G15 pirate ships which do not take place in the Shadow Realm.