ok, first of all i'm 29 lvls, 8 hours, into this powerset (on an electric troller); and i have some suggestions
1) turn Faraday Cage into a toggle - right now this power is basically essential to be up and running for rejuvenating circuit, energizing circuit, insulating circuit and empowering circuit to be worth even taking. with the pace most tfs run at recasting FC over and over again isn't worth it due to the slow casting animation, making it so a party can already be onto the next fight before you finish casting it again. Furthermore it's far too small, there is almost no room to maneuver in it, worse, without this power's extra effects on the other support powers, most of this powerset is junk, underperforming and annoying to use. so if we can't keep this power up as a toggle then this set loses almost all of it's purpose.
2) increase the -end drain of it's own powers. right now i've pretty much given up sapping foes with an electric troller -till i get to Power Sink in the epic powers. Sapping is already an underpowered effect in this game, the fact it does almost nothing outside of "shock" to sap end from foes make this set highly questionable. I'd much go back and reroll an electric/kin or electric/thermal for their end sapping abilities then electric affinity. you guys dropped the ball on this one. I think instead of the static mechanic you should just have a PBAOE -end drain effect which powers all 3 of the circuit powers (and sentinel pet), lots of foes around the caster the stronger the healing and end effect is.
3) rework the circuit power effects, these should be PBAOE effects, or some sort of untargetted chain effect ( for example, starting with the character going to the next closest character and chaining from there). having to target allies in battle while doing other things makes these powers barely usable. combined with the long cast times and the electrocute effect/bug on energizing circuit and these powers just feel weak (maybe not empowering circuit.
4) i'd like defibrulate to work like the darkness affinity res. only instead of sucking life it sucks end from surrounding foes.
5) I know the reason for the Galvanic sentinel is mostly to support a solo build, because none of these buff powers self target but all chain. make the powers able to self target self target, get rid of the worthless pet. give the power set some other clicky power or a debuff or something; right now there is almost no reason to take EA over any other troller powerset except for character theming, it's terminally awkward to use, slow to case and underpowered in effect. some sort of toggle targetted debuff, or damage aura, or end drain aura, or beneficial aura, or heck even a pbaoe hold would be so much more useful then that stupid pet.
6) the stackable static effect either isn't working or doesn't have a visual clue. while my other suggestions want you to nuke the effect all together, I am willing to keep it if you make it clear you're getting any advantage form it. there are no icons, or graphic clues you have any stack of static at all.
7) currently hoping the last power on the set (amp up) is worth having. but just looking at it in mids, it looks like yet another power (like faraday cage) which should be a toggle.
I think the whole set needs reworking as it's just not good enough in it's current incarnation to be worth taking over a real set like darkness, kin, rad, time, thermal, sonic, ice, or bubbles.