Something I've been wondering - would a class combination like 'Seer of Void' be possible, and if so what would they even do? I mean I know the Seer is basically that, and Void is canonically 'nothing', so does the Seer of Void 'see Nothing' or...?

The thing about titles is they can be interpreted many different ways.

My interpretation of Seer of Void would be one who could see through or into the Nothingness.

Since Seer is a passive class someone could interpret it as one who sees what others are lacking (the void in the person so to speak). Such as patience or knowledge. 

It’s really up to the person.

~Mod T