@LB: Weird, dunno how I missed your second paragraph. As Ameena says, just because you have heard what others think doens;t mean you can replicate what they do. In a way, your DM characters in a game have the hivemind of all having access to the same runes, and spells, yet they don't all suddenly become the same wizard/priest level.
So yeah, he now has a better understanding of the FUL rune, say, but he's not likely to master even that spell to invoke it by the end of this contest

I might change my mind if Raixel or money cannot come back before the very end of the game, but it would be some other risky gestalt thing using their own mana and abilities.
Anyway, what I will say is that looking to your character's epilogue, of course having explosure to this knowledge (and Westian's plans to invite Falkor back to the guild) and also meeting Petal, who balances the wizard and priest paths, you can certainly decide that Aurek would perhaps take the opportunity and his fast tracked hivemind knowledge to become a wizard/paladin under Petal and Falkor's tutelege after the game finishes. Might be a nice echo to your original character concept.
@Ameena: Remember Ghiolst doens't have to be in the material plane. The fact no one can see the activity of any ghosts around might indicate thigns are happening in the ethereal plane ,as I mentioned the Haynuus. I did actually indicate in the main post that Westian seemed to detect Gholst was somewhere between Theron and the soul stone plinth, so if you can't actually see him there....
As to the hivemind knowledge, indeed, you can assume 0- even if Ameena doens't understand it - she knows roughly what everyone else knows now. For exactly this reason, so you guys don't have to worry about IC and OOC knowledge and being uninformed at the end here. Lol, imagine how it would have gone if you'd chosen differently! Confusing!