lol, you don't even need AF3+2. I do BLM to Voidwatch on my V.cloak mule and all it costs me is a little damage.

The difference between a Black Mage that lotted the things that dropped from monsters he was killing anyway and a dedicated Black Mage is Magian Affinity Staves and +2 Relic. I don't know any dedicated Black Mages, but I can look at the gear and tell you the amount of effort it requires to obtain way exceeds its usefulness.