Testing it in PvP/WvW there is a lot that doesn't work on this elite..
The F5 mechanic is bad.. Long CD for a single stationary field with a useless energy mechanic on that.
Solution: Make F5 attunement based with no shared cooldown, similar to scourge shades OR atleast make it moving around the caster
Hammer is bad:
Damage is way too low, a weapon with mostly just dps on it should wreck things; this one is slow and does no damage.
The number 3 skills don't work with how the core ele rotation works: you cannot rush attunement swap to keep it up, that's not how core ele plays. It's clear that who designed this never actually played a core ele in pvp/wvw. Make the buff last longer like 10 seconds.
Also, for the love of god, give hammer more finishers/field...
Augments are weak, they require being on an exact attunement and on the F5 field at the time you need them (spoiler: pretty impossibile in pvp/wvw)... For what? Not a big payoff anyway. Rework them or atleast make the "payoff" baseline.
Traits are fine, the idea behind most of the is cool. Maybe rework the ones based on F5, they won't work like that...