Depends on what you want to do. For speed farming T10-13, if you are just going for keys and mats, the Walker Build for WD is absolute king. Or LoN Bombardment Sader. I have my Bone Necro doing 80 GR with about 4-6m left; depending on rift levels of course.
My new Necro combat routine has completed GR 94 so far using Rathma and still pushing with decent gear (bot going offline stopped the push for the moment). Check it out