First of all, don't play Jade. It is weak spec and is not capable for high greater rifts like 70+. It is capable of course, but with higher paragon level and better legendary gems and other items. There is more easy builds to complete gr 70, like zunni garg or ararchy spec. Don't make your life harder, unlock primals at gr 70 with more common build, and then you can play with your jade if you enjoy it, at least you will have unlocked primals.
P.S. i really love jade spec my self, and hope it will be as strong as it was many seasons ago. but currently it is not capable of pushing high greater rifts