I can now confirm, as I did it myself, Scholar 30 can queue as healer for 15-25 instances/dungeons, and actually does wonderfully at them. Well, Eos does, at least. Little fairy stole my job, I'm just nuking at stuff...

But I <3 her way too much to get angry at her. It's so fun to heal as Scholar! And the queue times? Instantaneous. Take that, 95m+ DPS queues!