Meta predictions: What will be the top tier clear speed or boss killer builds in 3.0?

Assuming most spoilers are out, and assuming few changes will be made from now until 3.0's release, what do you think will be the new OP builds? My money is on vaal pact BV Berserkers. Insta-leech is too good to pass up. Also, I think hybrid builds (life/ES) are going to be more common. via /r/pathofexile http://ift.tt/2rVe5CC