Leveling advice

[Bixby]

As you get higher in levels, you'll find your queues getting less and less instant, though still better than DPS. So take advantage of the instant queues while you can. And when they start to taper off, throw in some fates and leves while you're waiting.

Questing is probably still faster, depending on the quality of the parties you get. A good deal of how well dungeons work for leveling depends on the speed & experience of the people you end up with. But as you said, questing is much more helpful for DPS. And since most of the quests you get (that aren't just travel & cutscene) boil down to "kill 10 hoozits," questing is also generally (a bit) faster with a DPS than with a healer.

[Rolien]

Alright thanks for info.

[Nerael]

Personally (41 WHM right now)
Dungeons are the way to go in my opinion. As a healer we can hold our own solo, yet do so much better in groups. Questing will be slower as healer than DPS or Tank roles.
Yet the Dungeon ques are quite short for us. Like Bixby says: Take advantage of it.

Especially on low levels the que is near instant. At around level 30 it starts slowing down a bit but still well worth queing (1-10 mins on average).

We are made for healing and we do not do well when we have aggro. Especially not with multiple targets. Sleeping the targets helps a lot though. (Chocobo tank might help a bit).

Not to mention the gear we get in dungeons is usually superior to most crafted/store bought gear.

It's also good training for end game. With PUG groups you might get a great group; but you might also get the worst group ever. Either way both teach you how to fulfill your role better for endgame