Continuing the "how to interrupt ressers" topic, well, it kinda depends (at least to me) on the position where the dead player is, and wich arena.
On lordaeron ruins, i once took out a hunter, by standing in the green water, thing is, he died in the side of the middle tomb, so the other team shaman was trying to ress him all the way back from the gy side, so i had to break my MB to go there and earth shock. They had 3 ressers, enhanc shaman, holy pala and a dpriest, and this new proximo helps a lot, tho i didnt knew u have to be focusng on target to see the cast bar.
So, u gotta watch out where the body lies down, and if theres any chance for them to ress, it often comes down to the fact that they will show their ressing, because ur not anymore allover the arena, u are back, MB'ing or just waiting, making preasure on their heads :P I remember to play 5man arenas with 4 friends, and we didnt had much experience on it, but as usual, we got the best gear we could get. I was playing a warrior, and basic setup was war/hpala/lock/mage/eleshaman or eleshaman for another healer...and... it was amazing how often the other teams ressed their players, without no one notice. From what i think, ppl must think someone will be watching it, and no one will. Sometimes its just lack of attention. Now im quad boxing, and either me or my partner will spot the ress in 1/2 seconds, theres much more focus. Theres also another thing, ppl dont comments much, but...we only have to count on 2 ppl to do arenas, and thats awesome. No more: im not here today, or wtv. At any time, after work, we can manage to do arenas.

I've only done like 50 arenas since i box, but i think i can give some ideas on what i think results best, at least in euro arenas, cause i've seen a lot US movies with headless chickens :P
-same arena in a row, im used to make something different, i usually rush according to the arena, getting my ground asap. Im much more confident when im in lordaeron controlling their spawn point, than them controlling me inside mine. Im starting to make this a frequent move in lordaeron, go for the green water, own a side so they can only: a) los u with the smaller side of the tomb, where my priest can fear them; b) stay on spawn, and now they will have a man down, when they come out.

-so u managed to kill one, and they decided to LOS instead of making an attempt to kill me. Keep an eye for the rez, and i'll stay and do what i like the most in an arena: mana break. Sometimes i see one or two of them desperate to stop me from getting my mana up, i love panic , so it ends either on failed attempts, or on an increase of panic that will give them a loss.

-try to show ur brain the less possible, at least when u run similar names. on most arenas i'll move to los areas, and once there, ill move the less possible and always in ghost wolf, on top of the other chars, causing them to target the wrong one, and upon their rush, they wont have time to call to focus another target, they will be one man less, without nuking me where it hurts the most. OFC they will know ur main after some arenas, but this helps when u start ur arenas

-i cant stress enough the fact that, u have to show them ur cool, calm, ur there to win, and their there to panic. I often take my time, along with my partner to check their gear, we can afford to nuke palas and mages, my partner can mass dispell them fast.

these simple tips were made on some own arenas experiences, and they gave me rating to buy bracers, and on the future, my pants. Hopefully i'll reach 1600, only 1/2 wins away from it, to get the chest. i hope to get 1800 one day as well.