I know this has been posted before, but i have updated it. I hope you wont look at this as a repost. You guys know, that it is possible to cast in arena after you're dead when you leave arena and have like 1 second of time. This is not enough most of the time, so i made a macro, that works most of the time.
Code:/script LeaveBattlefield() /cast Death Coil Rank 4
i am not sure about the "rank 4" spelling but shift+click from the spellbook works perfectly You can use any other instant spell you have. Most of the druids use lifebloom.
Note: This is unusable as a rogue, the best thing you can do is make 1 normal attack, because when you leave the arena you're with 0 energy and you just don't have enough time for it to regenerate. Same goes for warrior.
Edit: This can probably get you banned if you overdo it ;(