I finally did Heroic Halls of Lightning.... I can't believe how easy it was.

First boss is truely a tank and spank killing adds first. The key is to wait until he doesn't have a charge on him before attacking.
he does a spin thing that I thought did zero damage to my tank. no stacking bleed affects, etc.

second boss was just as easy, spread team out some in a box formation and I drop fire elementals once he's called for adds.

third boss, again use a box formation with the healer being farthest from the boss. when he spiders I switch to my healer screen and just heal thru it. no movement on anyone including tank. I think I used healing stream totems x4 once the fist spiders are out. The farther you can tank from your team the longer it takes for the spiders to travel to your alts.

last boss, set team up standard follow of the tank at 4 o'clock to the boss. pull and tank boss next to shaman. when the deadly boss mods raises the raid warning about him casting his nuke I step back about 3-4 paces ( at most the size of one of the floor tiles ) and nobody takes any damage. resto shaman only has to do a few chain heals on herself to keep the team topped off and minor heals on the tank.

I guess the best part about all 4 fights is that you really don't have to move your team except for the last fight and you don't have to move very much. aggro on the alts seems to be minimal.