Cursecaller Event QuestionFollow

For you vetren raiders that have done this mind helping me sort out a few things?

Cursecaller Event - Inktuta

I understand the concept is to burn down the six names while agro kiting the DT mobs.

I have read there are only 4 DT mobs. Last night I bet we had 10 of them instantly. Which is normal?

Does rotting the DT mob really help at all or just out right kiting and rezzing the only way to win this?

Do the DT mobs despawn after you kill the six names?

Any other insights you would share with me is much appreciated.

Thanks,
Jose