OT: What root apps are you looking to use? I saw you mention Substratum, which is awesome.
I'd like to use Substratum again, but the ROM I'm using is on a 7.1.2 build for the Nexus 6, and I don't want to mess with the Swift Black theme I was using until it's updated for 7.1.2. I can't be certain, but the overlays may have been causing crashes when I was using it even before the 7.1.2 update. After all the wiping and reflashing I had to do to get rid of the crashes and battery draining, I didn't feel like putting Substratum back; but I do miss my black Settings card and black notifications.
I haven't gone searching for specific root apps yet. I do know that when I first flashed Magisck I was getting toasts about root access from a number of apps when I opened them; LTE Discovery, Fi Switch and Total Commander are the three I granted superuser status. I just felt stupid doing it because I didn't really have a reason for granting access other than the fact that I use them a lot.
You've got some suspicious activity going on. Apps like Android Pay
No, no. There's nothing funny going on. The line about AP was just a wisecrack because I couldn't remember the names of the apps that asked for root access but didn't get it (and they didn't get it only because I got tired of all the pop-up toasts about access).
All of my apps are from the play store; there's not a sketchy one in the bunch. Just some that I ought to delete because I don't use them.