Hey, um, also a new user here. I've been getting into a playthrough of many mods, NPC stronghold being one of them. And... well, Edwin's Planar Sphere content is also very bugged.
In order to make Teos appear, it seems that you have to let Edwin kill the knights, do not interfere with his attempt (and yes, you will lose reputation for this). But after Teos appears, comes another bug: the game goes on an infinite loop of cutscenes spawning red-colored Cowled Wizards.
So damned if you do, damned if you don't.
Kish, if you're listening and still updating, please take note on this bug in case of 'Edwin inherits the Planar Sphere'.
Thank you!