I think you might find that Electrickery kind of sucks most of the time. Of course there are times when its nice, but just remember what decks you will be facing. Might I suggest Annihilating Fire ? More damage and exiles the critter, perfect for the numerous zombie decks everybody seems to be relying on, and while I know the mana cost is relatively prohibitive, if you draw them with epic you will certainly be happy. And if you can find a place for it, maybe 3x Snapcaster Mage ? I am not sure he is a good fit here (because if you use the experiement then he probably doesn't have very many targets..._) but if you haven't tested him its worth the shot. And I am a huge fan of rakdos return, but not exactly here, maybe cut it to one or two and boost one of the more relevant defensive spells because against a really fast aggro deck you might get blown out or be forced to block with the sniper, which kind of ruins the whole deal. Maybe instead of the return why not try some counters main board to protect your gutter snipe, like Dissipate or Syncopate ? I know its kind of all over the place, but I really like the deck and I feel like just a few minor tweaks can really make it scary. Good work!

Oops, I missed your Dissipate in your sideboard, lol. And Annihilating Fire is probably a bad idea, but I really feel like you will be frustrated with Electrickery since 90% of the time it will probably be a dead card, plus it only targets creatures so if you draw it with epic experiment it probably won't have much effect, so maybe Mizzium Mortars ? Of course I make these suggestions assuming you have literally infinite money, I know I could not afford triple snapcasters with the way my funds are looking, lol.

Notice I do have Quad Steam Vents in the decklist... I do have 3 of them... the snapcasters may be a good idea. I am not a huge fan of Mizzium Mortars as opposed to Electrickery as it will stomp exalted and human token's. card:Rakdos's Return does its job, their gamestate is moved to a screeching halt. But downing it by one for an Unsummon might be more beneficial. Annihilating Fire just didn't get there when I playtested it when first debating whether it belonged in the deck. but thanks for the suggestions. Any more or anyone you know who might be able to provide more suggestions is greatly appreciated. I was also debating putting in Essence Backlash as another counter spell that might be good in a sideboard against big stompies or "The Big Stompie" a.k.a. Worldspine Wurm .

I'm not sure if Blood Artist is really working here; I think that it should be Rakdos Charm because you can hit it off Epic Experiment (which is my favorite rtr card), and you can still have it deal damage for each creature your opponent controls.

Also, being a combo deck, you need a way to protect yourself, I suggest Duress at least in the sideboard. Because blue decks will pack counters somewhere in their 75.

I see your point about Blood Artist but I need a crature so I don't get mauled by extreme aggro decks. I'll test out Duress and see if it gets there but what can I take out for it?

I found that I had to really work hard to protect the Guttersnipe for it to be relevant or atleast to be there long enough to get 1 lethal combo turn with an Epic Experiment . Apart from the card removals and counterspells I found that Mizzium Skin worked for me in my IZ this the new Burn ? deck . Just my 2 cents.I wish you good luck on the deck and many happy games.