Evs: 252 Defense, 252 SP Defense, 4 Speed
Dragon Claw or Crunch
This is a Physical Set, although let me explain this. After two years of training this little one to be the best (I believe) he can be, I've made him a very defensive Pokemon. People might be confused as to why the Evs are so Defensive. Here me out.
Due to Eelektross' low speed, he needs to be able to survive to dish out damage. Whilst he won't do as much as an Eelektross with 252 Attack and 252 Speed Evs, this one can be an annoying little critter with it's durability/sustainability with Drain Punch and Leftovers (also covering his Wild Charge recoil). Besides. There are very few Pokemon that move slower than Eelektross, regardless of Speed Evs.
Dragon Claw: Coverage for dragons, and it's pretty cool to be able to use a Dragon move whatever the situation. Can be switched for Crunch, which is also a great move, lowering target's defense.
Aqua Tail, This might confuse some people. 'Huh? Really?' There are a few things to take into account here, mainly moves such as Gravity, Smack Down, or even abilities like Mold Breaker. As many people try to get rid of Eelektross' ability, Aqua Tail really catches people by surprise, covering Ground, Fire and Rock.
As a tank he is quite scary, especially when setting up with an Umbreon who baton passes 2-3 curses...
He still works as a high risk/reward Pokemon with Maxed Attack and Speed Evs, but I personally, and through many tests, prefer and support Tanky/Durable Eelektross.
Have fun :D