WOW Gold: Keeping that in mind you might find Tarutaru to be better as Black Mages
Part-time Black Mages: Both White Mage and Red Mage are good options WOW Gold as they provide a good MP boost.
However, the Red Mage sub job won’t get you as much MP as a blm/whm combo would. The White Mage sub job will also add the healing power to the Final Fantasy XI Black Mage, which is always handy.
The Summoner sub job boasts the added incentive of MP boost at level 10, so it can be considered as well.
At low levels, thief sub job will also work out fine with some gil/treasure hunter skills you might end up with more to spend on those expensive spells. So give it a though.
Black Mage Race Issue: Overcoming low INT/MND is easier than over coming low MP, so choose wisely. MP boosts are pricy stuff around Vana’diel. Keeping that in mind you might find Tarutaru to be better as Black Mages, as they bring MP boost with the job.
While the Humes do well also, because they are a well rounded race in the stats. Elvaan can be good as well, but not like the Taru or Hume.
FFXI Black Mage Abilities: Job abilities mean special strengths which are unlocked after the required number of levels is completed. These can be reused after a specific amount of real-life time has passed (re-use time for each ability is different).