Focus Ashe. She will do the real dmg in the team fight. Then I would Sej then Rammus. Watch for the taunt, and put your tanky dps in front of him and have your caster/ad burst him down.
© 2014 Riot Games, Inc. All rights reserved. Riot Games, League of Legends and PvP.net are trademarks, services marks, or registered trademarks of Riot Games, Inc.