So i transfered my resto shaman kitted out with full furious and got full relentless offpices + relentless weapon on the ptr.
Had about 24k hp, 1200 resi (14.50% damage reduction) and some 2500 spellpower.
Survivbility is now so good that pretty much the best way to kill healers is to litterally zerg them down with stuns and cc spells and people know it. dual rogue + protpally healers etc for the stun spam noskill zerg will be the ticket or team such as rmp will be even stronger.
Just watch as this turns in to one big cc spamfest.