Hearthpwn

I DON'T suggest crafting this deck. Play it if you already have the cards
Fun Rogue deck that is pretty simple to pilot, compared to the other archetypes in current meta.
Just draw as much as possible to find your Gaslight Gatekeeper, swap your whole hand to make the giants cheap, replicate them and win

Mulligan:

You definitely want to keep Gaslight Gatekeeper since she's the key to make everything work.
You may also want to keep Quickpick, Dubious Purchase with Preparation and Dig for Treasure just to thin your deck if you already have Gatekeeper on hand

Zilliax Configuration

Couldn't select it while creating the list, so just run Perfect Module nad Ticking Module
the idea is to have something to deal with decks that flood the board, but it can also be useful later on to remove stuff out of the way once you fill the board with giants.

Matchups:

Bad: Aggressive decks for obvious reasons. You have to set everything up by turn 4, but you don't have much to remove board other than weapons and Dubious Purchase. You still have some chance thanks to Zilliax and Everything Must Go!

Facing Plague DK is also pretty painful if they push a lot of plagues early on.

Manageable: If you are facing a lot of decks that run many taunts, you could swap Speaker Stomper for a silence tech card

Good: Everything else, as long as you don't draw poorly, there's always a chance.

Final words:

The nerf to Celestial Projectionist slowed this deck down a bit, but at least it still works and it's pretty fun to play.

From the Scrapheap can find you lethal with Windfury, can hide your giant for the next turn with stealth, and can even make your hand full for a Gatekeeper play in the early game