Hammer 3 with 5s duration is hard to maintain when majority of the skills have cast time that will immediately eat it up: Fire 2 4 5, Water 2 4, Air 2, Earth 2 5. You have to quickly and constantly swap attunements just to maintain all 4 orbs, you'll barely have time to use utilities. Then, using Grand Finale with all 4 orbs doesn't even do that much damage considering how hard it is to maintain.
My suggestion is to either:
1. Make the duration longer than 5s.
2. Or increase damage output of using Grand Finale.
Jade Sphere F5 is hardly rewarding to use. You build energy slowly, you use it on an enemy, move on to the next enemy, wait for the Jade Sphere to run out so you can reset it and use it again, then build up energy again. Or you can try to recall it to manually reset it, then start building up energy again.
My suggestion is to either:
1. Make it mobile, where instead of a ground skill, you cast it on yourself so it follows you.
2. Or when you recall it, you should regain the unused energy and cooldown will be reduced based on how much energy has been recovered.