I actually rather like the arena mode.. I mean its a little like css, except better and ends faster... which is the main thing to be thankful off... what could be done since it records total amounts of wins... we could go of that count to see which clan is the better of the group..
If we were to do arena's though I would think it would be Ravine and Lumberjack which both are rather nice new arenas of which no one is to familiar with making no extra advantages as such.