I don't really play a lock much, but with my mage I mount up and gather a group of them then LOS them some where then AOE. There are a lot of hunter types so that kinda sucks.

2 things that you need to worry about totems will aoe heal them so they need to go down. As a mage it's not that big of a deal, but pallies have some trouble with them. The other is the hunters will stay at range unless you LOS them, which can be a pain because ZF is wide open. It helps to have heals because these guys hit a decent amount harder than SM cath.

This is just a thought that probably wouldn't work to well,but you could...

1. mount up and aggro a good number of mobs.
2. once they are close together have your mage cast improved blizzard to slow them down( ride through the blizzard).
3. Seed the group
4. Take out ranged that didn't get hit by the seeds
5. Profit

This would be the fun way to do ZF.