Are some of them just overlooked right now or did you really feel like flying mobs should rape Wizards even if it makes no sense for certain skills?
i.e. Flame Ground - This actually makes sense, considering it’s a ground fiery circle DoT and also a very good skill otherwise.
Frost Cloud - From the visual you gave the skill (almost a recolor of flame ground, really) it makes sense for it to be a ground skill. But “Cloud”? You need to either change the name or functionality of this skill - preferably functionality seeing as we’re already plagued with ground skills and it’s ridiculous that at rank6 you still have to struggle with flying mobs.
Now, Sleep, Prominence and freaking Rain? How does it make sense that rain pouring from the sky is a ground skill? (to say nothing about the fact that Rain is actually garbage, even if it did “hit” flying mobs). Sleep also makes no sense visually or mechanically - CC is already boned by an arbitrary CC resist on every entity in the game.
Prominence also makes little sense visually, and even less mechanically. It’s simply yet another blow to an already lackluster skill.