Are there any suggestions (or data) on how much Accuracy we should have for the new Savage Raids tiers?

I will soon be melding materia to my new gear and I am wondering just how much I am going to need.

My main job is WHM.
My DPS job is NIN.

Furthermore, will there be some Accuracy requirement for WHM?
I haven't been into the Savage ones yet, so I'm not sure. Is there some DPS check?
If not, I'd prefer to get Piety, Det, Crit, and / or Spell Speed materia instead of Accuracy.

Is there any information or speculation?

Thank you.