Not joking about Phantasmal Force and Dissonant Whispers though; getting people to hear unsettling whispers; take psychic damage, and force them to run the fuck away alongside getting people to hallucinate something they perceive and will rationalize as real to the point of it being able to harm them seem 100% up his alley, now it just takes him being in a mental state or environment where he could learn them cause they are both spells he is of a level to cast.