Kiting Coilfang Striders
I run the fight in full PvP gear, except with Shard of Contempt instead of Battlemaster's Determination, and I start with both my left and right Fists of Brutality. (The Medallion of the Alliance helps in the first phase if someone in melee range gets static charge while we are rooted.) When phase two starts I have time before the first strider appears so I get prepared. First I click off salv--actually I made a macro for it because one attempt I forgot to do it right away and was frantically clicking off buffs while I was running to the strider. I ended up clicking off my flask and Blessing of Kings. The macro is simple btw:
/cancelaura Greater Blessing of Salvation
Once that's done I equip my s2 axe and my s1 shield. My armor goes up to 13k and my resilience to somewhere in the 320 range. This will actually allow me to absorb a hit from the strider if something goes horribly wrong, or suck up a cleave if a naga is too close to the edge. We've found that a loose strider is a guaranteed wipe so I do everything in my power to stay alive.
The other thing I have prepared for the fight are Swiftness Potions. They are very easy to make and saved my butt in a few close calls. While I'm waiting the 50 seconds for the strider to pop up I spend my time dodging Vashj's forked lightning. I need to keep my bearings because when the strider pops that side will call it out "Strider at west!!" and I need to be running to the west and not the east. A split second can make a difference in keeping that thing off a healer. Everyone is instructed or net or stun the strider as soon as it shows up on their side giving me an extra few seconds to pick it up. And then the fun begins.
Constant Frost Shocks on the strider keep it slowed and angry at this ol' shaman. I drop Earthbind Totems whenever I have the chance. I always kite clockwise so that when the 2nd strider pops--we are not yet strong enough at this fight to get 1 down in 50 seconds--the 2nd kiter can pick it up and also run clockwise. For most of the fight I can walk backwards and frost shock while keeping it at a safe distance. I found that running from it required me to run back to it when I needed to frost shock. Now I just calmly walk backwards along the the platform doing my best to keep it off the edge where the healers are standing and acting as Tainted Core relays. And also keep it out of the middle where the healers (shield clickers) and melee wacking away at the nagas are standing. Everyone that can net the naga does. Everyone that can dot the naga needs to do so and for the most part does. I frost shock every 6 seconds, walk backwards at a nice pace. If I think it's getting too close I will drop an Earthbind, turn and run about 20 yards and then wait until it's 25 yards away to continue my cycle. And yes 25 yards on my shocks, not 20, thanks to my S3 gloves.
That's the plan. Following that I'm able to stay alive and keep the strider focused on me, consequently giving more time for the raid to kill those tainted ele's and loot their cores.