Lolz, funny idea

Ice would totally win.
You could also try playing human hockey:
1) Get all your friends to make level 10 warriors, and a few people to get 10 bard for speed
2) Level up 1 Moving March and 1 Shield Trash for its 80% knockback =)
3) Find a playing field and designate goal lines with Harmony Therapy circles, rocks, or something
4) Make parties with different colored capes and designate one person to be the hockey puck (or a few people)
5) Everyone starts off at the goal line, and at the signal, run up and Shield Trash the puck until he/she enters the goal. Harmony Therapy works very well. (it gets pretty chaotic because people on opposite teams can repel each other in the process)
-Run around Donwhang and smack everyone in sight, especially those you hate
-Have fun interrupting pvp by bouncing people everywhere
-Gang up on a full sunner and repeatedly hit him in the safe zone (10 vs 1)
Did this with guildmates once and it was epic win. 4 on 4 warrior pinball.