/tar searing totem
/tar windfury totem
/tar tremor totem
/tar mana tide totem
/tar grounding totem
Mine's less cool-looking, but generally the same macro. I have it bound to a separate hotkey from any other spell (Z), and I also spam it when I'm on global cooldown/mid cast. The thing I like about mine over the one above me, is it assist's the other DPS in my group (just remember to switch the name depending on what team you're playing on + bracket) and is usually a good thing to spam even with no totems in the arena. This way you get used to hitting it reflexively, not having to consciously think about it when fighting shamans.
Same problem as stated above, occasionally the macro will target someone with a similar name to one of those totems (going in descending order, Grumbug > Manthar > Trooth or whatever
), and it will take the pet off who he was on originally. Just get used to hitting Ctrl+1 and it'll circumvent this occasional problem.