I play healer and I've never seen healer as the class for the roulette bonus. Always tank. xD
But that's ok. Plenty of other ways to get your points... besides, I ALWAYS end up with that Sirius dungeon and I can't stand it. As a healer, it sucks. And I've literally never gotten any dungeon other than that one. Not once. I'd rather go do WP SRs.