Then the dance ensues. I salute, and the Mage waves. The Mage starts /saying things that I don't understand. I shrug. I wait for awhile, hoping that this will signal that I am willing to let the Mage go first. I'm hoping that my politeness infers that I will help.
Finally, I point at the Mage, then at the mob. Taking a leap of faith, the Mage tags it, and I run around behind to help, perhaps with a guildmate at my side.
After our parting farewells, I sit down to await a respawn. Personally, I think it would be much easier if I could say "I'm here to save the day!" or "I come in peace." Of course, there is some charm involved in finding a way to use our current emotes to communicate other messages, especially after Blizz added new ones in 2008.
How do you communicate to a player of the opposite faction messages that aren't directly built-in to emotes? Are you aching for a certain emote that would help you do this, or do you enjoy having to puzzle it out by piecing together existing ones?