Shield Defense. Lightening Rod + Shield Charge = double the teleporting aoe goodness. Other than being a solid aoe build however (even aside from those two powers), there's no particular synergy there that I know of.
Elec/Stone - Lightning Rod is a very effective and eye catching way to move a granite between spawns. The -rech penalties in Granite take quite a bit of slotting around to get it up often enough though.
Elec/EA - Elec's AoEs help make up for the lack of a taunt aura and the heal in Energy Drain is rather good if you can use it in the middle of a large mob, which is where Elec/ likes to be.
Elec/Dark - slot a Theft of Essence proc in Dark Regeneration and you can Lightning Rod -> Dark Regen into a spawn from redlining health and less than 20% end and come out with both bars full and the mob only just getting off the floor. Elec/ is a bit less endurance intensive than some sets, which helps with /DA's toggle heavy nature. Elec/'s lacking single target damage and long animations combined with /Dark's mez auras could cause fury problems though.
Elec/SD - AAO helps make up for the lacking single target damage... when you're surrounded. Twin teleports sounds good, but then both of your highest damage AoEs are hit by the pet damage cap and your tier 9 from your primary is doing less damage than the tier 8 in your secondary... might as well roll this one as a scrapper and get the higher base damage modifier and better version of LR.
Elec/SR - Quickness gets the recharge of Lightning Rod down.
Elec/Elec - Lightning Reflexes... see above. At one point the AoE knockdowns helped a lot; giving you time for aid self to go off; with the addition of Energize it's largely unnecessary now.
Elec/Fire - Lightning Rod into a spawn to knock them down, drop a burn patch and immediately Thunderstrike, the knockdown will come just as everything has stood up again, keeping them burning for a bit longer.. Fiery Embrace + Build Up + Lightning Rod would be nice, but the low damage cap on LR eliminates that possibility.
Tossing around a new Brute concept for PVE. No more Willpower or Invulnerability though, done those enough.
With that in mind, anyone able to comment on the synergies the other secondaries may or may not have with Electric Melee?
Tales of Judgment. Also here, instead of that other place.
good luck D.B.B.