Yes, it was…
Eldritch Guardian (Epic): 4 Wizard Souls
Keeper of Lore (Epic): 5 Wizard Souls
Ahrimas (Epic): 6 Wizard Souls
Nyar’Mel (Legendary): 7 Wizard Souls
Medea (Legendary): 9 Wizard Souls
Vash’Dagon (Mythic): 12 Wizard Souls
Literally the same scoring, where Rarity awarded more points and none of it scaled with level.