Any issues with substratum? I tired it with a theme that was 7.1.1 ready and boot looped. I want to try again but want to be sure on the process. I'm also running ElementalX and weta 1.01
Zero issues so far, I'm also running weta 1.01 and ElementalX 1.0
You need to use legacy as legacy refers to stock and you are using a stock rom. Usually substratum will not even show OMS options while running a stock rom.
That's strange considering that in order to use oms the rom has to have oms commits merged into the rom. Stock roms do not have oms commits and are supposed to use the legacy way of applying the themes which include building the apk's and forcing a reboot to apply the theme's apk's. The apk's for each app's theme get's pushed into the vendor overlay folder on the devices root where oms apply's the apk's alongside the app's apk's in device/system/app and priv-app.