I appreciate all of the ideas and comments, guys.
The Shadow Priest/Psionic comparison makes sense. I wish there were yet another Glyph to get rid of the Purple tint of Shadow Form completely and maybe different color spells.
I though maybe new lore could be created for Psionics that originated in Argus.
I don't think Bard lore would be very difficult to put within the game. Maybe we find some ancient instruments with magical properties in Archeology.