Our guild recently downed LK on 10man. For phase one, the off tank would pick up only the first four ghouls that spawn and after that any horrors that would spawn. People who have the necrotic plague have to run to these adds asap and be dispelled. If at anytime the OT only has one add (hopefully a horror) to tank he'll taunt one ghoul from me - though he really only wants 2 horrors. The horrors enrage mechanic only lasts for one or two hits before they de-enrage and for the most part can be ignored - healers might want to call out if both horrors are enraged at the same time. Using this strat we always got to phase 1.5 only seeing 2 horrors max.
Going into phase 1.5 we spend the first few seconds getting into three separate positions and aoeing the ghouls as much as we can. If we still have horrors up the off tank stays where he is (away from the group) until the horrors are dead, which should be soon, and the disease is dispelled as it will finish being on the OT.Once raging spirits come, the person with the debuff runs to an area which is easily visible by me, so I can taunt the raging spirit as soon as it spawns, dps all switch to the raging spirit using incidental aoe to finish off the remaining adds. It wasn't uncommon on our attempts to have one or two ghouls left going into phase 2.
Other Hints I'd add:
- If you aren't in the best of gear, get a taunt rotation with the tanks - as soon as soul reaper is put on the one tanking LK get the other tank to taunt and hold the LK until the LK tank is back to full HP and he taunts again.
- If doing a taunt rotation, glyph of taunt (warrior) is very nice, i like.
- Someone with authority in the raid should acquire raidwatch 2. It's like a modern dbm, but why I insist you get it is because it will put a skull on the people with defiles - no longer needing to rely on vent.
- Vile spirits in phase 3, unless your group is heavy on AoE damage (and geared), we found it was better to single target them down. As long as people were spread out one vile spirit won't kill anyone, it's when two vile spirits chase the same person that deaths often occur. Just remember they can be snared and or slowed which will make kiting them alot easier.
Lastly, the LK walks around me even when I stay still too! So far I'm blaming it on Australia's crappy net though. D: All the best with the kills!

