Yes two spells doesn't make us specialized as support, but our highest rated magic skills of enfeebling and enahcning, which we happen to have the highest of both for any job, does say we should be specialized support.
WHM's get the same enhancing as /SCH and actually have spells they can give others that benefit from it.

RDM has ~one~ spell that scales with enhancing magic and can be cast on other players, Phalanx II.