So Dorian’s specialty in Inquisition is necromancy, right, but he’s also when we meet him essentially Alexius’s runaway grad student where he was studying/inventing time magic and that’s more or less what Alexius does himself.
I just think that for at least a bit of magical studies, perhaps Dorian went to Nevarra to learn necromancy. Perhaps from well-respected (and at the time like 30) Professor Emmrich Volkarin. And you know something? I think he tried it.
ETA: apparently this is just. Canon! Well. Not necessarily Dorian flirting with his professor but like. It would’ve been 20 years ago and Dorian is Dorian so that seems like a given