Basically the JP one states making one self into virtual demi-gods while supporting the party by weakening the enemy. During the English translation they got the phrasing wrong and it turned into support others and while making them demi gods and weakening the enemy. RDM never was a buffing job, Haste and Refresh do not a buffer make. Haste just happens to be the most potent buff in the game, with Cure IV being all that was required to keep a group of four melee's alive.