Any chance of not losing abilities when doing low level dungeons?

[Moirear]

Mm, yes, Cure I spam is so hard!

No, wait, that's not the right word. It's boring.

I'll bite, and keep it short, because the following is quite universally true:

If you only use one ability in a dungeon, you're actually awful.

Less universally so, but there are no low-level dungeons until Haukke Manor story mode where you need to spam heals on the tanks to keep them alive, because they are handed sufficient gear and skills to not drop dead immediately. And by then you already have more of your bread and butter abilities to be less bored. :P