How are you going to handle artifacts during your RP sessions with strangers? It might be weird to see 3 Scythes of Elune next to your character.
IF I buy Legion, I'll main Night Elf arcane mage. If the artifact subject comes up, I will tell a story of splitting into 3 groups lead by Evenshade / Rommath / 3rd notable mage (Although none of those 2 appear in mage order hall...) to get arcane / fire / frost artifacts and that I assisted Evenshade who is now in possesion of the arcane staff.
IMO I'd prefer Adventurers not to be the main heroes. I'd rather want artifacts to be in possesion of notable lore characters.