I often just want to fight arenas forever and ever. So I think you guys at OOO should hook us up with something like last winterfest crossed with your standard arena-- except with a slower level progression, so that it lasts. Lots of treasures for this.
I realize that this may have been suggested several times before. I've even seen it suggested. I just really don't care.
Seems like a cool idea. However, you should go do a mission. There are Tier 3 missions that end with a nice arena.