Arelith

This is a feat that doesn't really have any purpose (unless there is a secret Arelith one that I'm not aware of). It only adds to your saving throw against 1 spell (Feeblemind) which is a will save, so most characters who can take it will already likely make the save.

Already there's a check when you're scried with the following results:
Scrying character wins - the scrying is undetected
Scried character wins - you get the feeling that someone is watching you (but the scrier doesn't know that you know)

I propose that Arcane defense: divination change this check to:
Scrying character wins - you get the feeling that someone is watching you, as already implemented
Scried character wins - you know who is scrying you (the scrier doesn't know that you know)