I'm not opposed to learning dagger skills, I love dagger skills. But learning dagger skills when you're a wind wizard is a little ridiculous. At 40, you WILL be able to combo non-stop from those 3 skills. Getting dagger skills would be a waste of points.
And you're "healing for healers" is a little eh. Any type of Wizards can learn heal and still be able to fight their asses off. If you don't want to heal others, then learning Undine/Dione heals only is still HIGHLY useful, it saves me a lot of time.