I have a thread with Alaric, but that doesn't make him Alec's mentor. In fact, I know for a fact that he is not Alec's mentor, because they would know each other if he was. xD
I'm totally cool with Solaiel being his mentor. :3
Just keep in mind that he'll actually have to spend time at the ATC because Stage 3 Candidates spend about...all of their time there.