Hey werdup i've been asking you that because yesterday i've joined a friend's guild run blackhand hc,
this is my armory
http://eu.battle.net/wow/en/characte...Evermaw/simple , the other shaman had kinda same gears as me except he had Mythic Bh trinket instead of Beating Heart, i've used SET he chose LM, and double haste enchant and saw he was doing same dps as me, but the source of his dmg was completly different, i would have linked the log but apparently it's deleted i can provide you only the source of damage from recount ( i know he's probably useless)
Mine
Other sham
I've used SS/LL whenever had a chance as you can see i've casted it much more and started on pull with SET and popped my FET in p2 as soon as my EM/trinket were back , is not shown in the pic but my casts of frost shock were only 88 in case you wondering, just seemed weird to me, thats why my question about double haste on pure single target, thanks for your time