[Eru]

For whatever reason Casino is the only place where I have problems. This is a shame since duelstones are there and I can't really duel as it is. Could duelstones be moved or just some more added to less populated area?

Problems with what? Lag? I suppose it could be related to the other stuff around there, but you can use the .bf (.battlefocus) command to ignore everything outside of your line of sight. I think it's coded in a way where the server doesn't even send the information.