The main reason I haven't made a multiple mage team is that their main AoE (Blizzard) is mouse targeted. People on here have gotten it to work, but to me it just seems too clunky. Also, multiple shaman, as cliche as it has become, can put out the pain. That, and they can self rez, heal, rez others, take a beating better than cloth wearers, have mobility in PvP (instant Ghost Wolf), and something else...Twenty Totems!

Don't get me wrong, the most fun I've ever had in PvP was with my mage pre-TBC, but for me, multiple shaman bring too much to the table.