Root issue running nougat (NRD90R)

Let's make this quick. Received nougat update, decided to root device, nougat version is nrd90r, twrp recovery version is 3.0.2-2, superSU tells me that I properly have root, root apps ask for root, the root apps never end up working and now I just want lollipop back. Tried cm 13 nightly but the zip file errors every time and I've downloaded it many times. Can someone give me some help. All I need is a rooted phone that works with Xposed. Thanks in advance for the help

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