This is honestly a pretty hard one to like. So many flaws and missteps.
Get rid of F5. There is no good reason you couldn't have reused the mechanic from the previous two ele-specs, where you simply hit the attunement (F1-4) a second time. Edit: Considering the synergy between auras and combo fields, and the implication that hammer is for melee, why not just have the Jade Sphere move with the ele instead of targeting an area?
There is zero incentive to recall your Jade Sphere if you're going to lose all remaining power. Either preserve the power or get rid of the recall option. On that topic, why does the Jade Sphere even lose power over time? Until now, mechanics that lose power have been reserved for features that either use only a portion of the power or where the effect improves. Things like a necromancer's Life Force are only depleted while being used. Suggestion: instead or reinventing the wheel, get rid of F5 and reuse the druid's astral force meter to track accumulated catalyst. Maybe change the meter's color with your current attunement.
Elemental Empowerment is a wasted trait. The only way it becomes useful is if you devote yourself to the whole trait line (middle row of traits) and focus on disable/immobilize, because you need Vicious Empowerment to reach 10 stacks.
I actually kept forgetting that the Augment skills existed. Totally underwhelming, especially when you have to be in a specific attunement and be standing in the right spot to get their full effect. Too many conditions, too little payoff.
I feel like there's a disconnect with Immutable Stone. It grants an aura based on attunement, but you have to be attuned to earth to activate it in the first place. It only lasts 1.5 seconds, so it's unlikely that you'll switch attunements before it absorbs its one hit. A poorly considered skill.