Blitzclique

A pure go-second Blitzclique deck. I love breaking boards with a powerful engine, and Blitz are quite good at that. Whisker is a maindeck boss monster that interrupts, extends, boardbreaks, the works. Crackle is our turn-0 in-engine interaction, Surge is our main searcher along with Coulomb, Steppleader is a great starter as it also triggers the secondary effect of the Blitz it summons. 
Regarding non-engine, Gallant Thief fits well with the crew, gets the buff from Coulomb, boardbreaks, and insulates plays. Fydraulis Harmonia pops, and mayyyybe could make the lvl-11 synchros, Dominus Spiral is non-destruction removal, and the pots are the only draw power. As such, we are sitting at 8 turn-0 interaction (possibly 11 if it's Whiskers along with Crackle) and 5 draw spells.
The extra deck mostly exists in favor of non-engine that uses it, here being Fydraulis.

Regarding alternatives: Honestly most of the cards that are not in the deck have been cut because you can't play an 80-card deck / wouldn't be much of a point to do so. It can fit so many good stuff so well, you just gotta draw the line at points.

• Interruption
Veidos the Eruption Dragon of Extinction can honestly be a good fit here, popping your Coulomb which you'll be getting back if the opponent doesn't have a field, and being popped by one of the Blitzcliques to nuke the opp's board.
Dominus Purge has no conflict here and along with Imperm, can give some turn-0 interaction to ensure half-boards.
Ghost Ogre is Fydraulis-light, interaction that pops.

• More Breakers
I would like to try Overvoltage more, but it being a normal spell instead of a quick-play makes the proposition much harder. Searchable via a hoop with Crackle though.
The Fallen & The Virtuous is an easy slot in, repeatable quickplay pop, but I'm a hipster.
It can do a Ultimate Slayer package to get rid of whatever you can't break through.
Similarly, Gordian Slicer bounces.
Thunder King is searchable via Alternator.
Final Bringer of the End Times can pop and trigger Blitz effects, and it can also serve as an endboard piece.
Offerings to the Doomed is another card that pops.
Pair Bear Scare!! is another card that pops.
Superconductive Plasma Blast is another card that pops, but has some interesting conditions. It's a pop on your turn, or gy / banishment recovery on the opp's, or an add from the deck if you were already going, so it can fetch Whisker for more interruption.
Voltester exists and is funny, but there ain't much applicability.
Astrazma Urania does all of the stuff the deck does, bounce yours back to summon, get special'd from hand, but negates instead of popping. Her timing seems hard to use though.

• More Consistency
Seventh Tachyon (with Surfacing Big Jaws to fetch it) with Giant Hand can fetch any Blitz, but will go -1.
FB Goods can dump the S/T to be added back from the GY by popping stuff. 
Planet Pathfinder & Rainbow Bridge of Salvation package to fetch the field spell, the former easier to use, the latter fitting easier if already running FBG. 
I run Extrav and Sloth, but Fuwa & Puru would serve similar function giving the deck some draw power since it has none otherwise, and they can also act as interruption. 

• Endboard
Honorary thunder Fleurdelis, the Thunderbolt usually can come down easily and fetch Punishment (which would need its extra deck package).
Thunderclap Monk is an easy negate to get online and also replaces itself.
Lightning Rod Lord & Zap Mustung can sit next to Rai-Oh.
Similarly Queen of the Blazing Domain has nice synergy but still is just a Di Fi on legs.
Litho is another wondrous buddy to join the frey.
Megalo - Astero - Meteor package could work. 
Adventure package can fit since the deck generally doesn't need its normal summon.
Thundercrash Snarecrow seems like a neat lower-power option, but might just not do anything.