The exact quote was "It has magic that can buff the party. We wouldn't say that is a Full Support Job if that is what you're thinking, but it's not as Attack Focus as something like Black Mage."

The "buff the party" comment that was made at Fanfest is equivalent to saying that Reaper has provides support buff with its actions in the form of Arcane Circle. So, there is not much to go off of here.

For the rest what it translates to me is that it will not be at the level that Summoner/Red Mage is currently at as they both currently fall under the support category in the caster role. However, Pictomancer will not be a greedy DPS like Black Mage or Samurai. Thus, it will fall into place below Black Mage but above Red Mage and Summoner.