I finished the Chateau of the Ravenous Rodent and should now find Valaste in Rawl'kha. I just hit lvl 50 and I have Mage Guild level 6. But she is not there.
Is this a bug or did I miss something? It is the first time I do this questline.
There are occasionally bugs where quest-givers don't show up for a reasonably long period of time. Something you could try is going to a different Mages Guild building in another zone, as Shalidor should appear outside that Guildhall as a different quest-giver for the same quest.
If I end up there it's normally cos I'm prone to panicking and getting in a bit of a flap , the wife just patiently pats me on the shoulder and says, calm down and focus dear, it helps that she sounds like lyris lol
Check your quest log, it's j on pc, look for listings for guild quests and it's normally in there
Go to any large city guild hall for the mages, if it doesn't the work at first then go to another, stand still for a moment and look all around you, he will be hard to miss
Otherwise log out and back in and repeat steps one and two