taultunleashed

1) Get a warlock
2) Find Thekal
3) Cast curse of shadows on him.
4) Thekal will be aggro'd now.
5) Reset the instance
6) Thekal will follow you outside
7) His zealots wont follow and will all stay behind.
Far easier kill now.

Part "5) Reset the instance"

you mean after you cast curse of Shadows on him, you need to run outside the front instance?

...err how? once you run outside of his little area he resets.

Can you be a little more specific?

Tested this, did it exactly as stated above and it did not work. Thekal had curse of shadows and still reset along with his adds.

Can we get a double nerfed confirmation?

Doesn't work. He runs back to his area.