@Jamesmor I meant the 5 point ones on Su (and the following skill) and Fo by condensed. Su ends up being 15 points for 200 ATK for the entire line, which is something like 3-5% depending on the numbers. I've heard something like 40-60 points is ~1%, though it may be more now. It looks bad, but the other skills are garbage as you said. Fo on the other hand is 5 for 120, or 2-3%. I'd totally grab that over capping the fire tree.
My other example that I'd go to would be Hu and Fi. Hu could take defensive options using those 20+ points. They have their niche uses, and I've certainly run into those situations before. But in general it's better to just throw it into offense because you can play around getting statused or dying. Fi is a question about consistency. In both cases you're choosing to put the points into ATK+ over another option, rather than because you've taken everything good and need somewhere to throw points. That's why I'm against calling them dump point skills, since that gives the impression that they're valued just over something like doing a dual stance Hu tree.