Looks like a pretty good deck. I haven't dabbled in Standard Peasant before, but allow me to help out.
You have one more Uncommon spot and looking at it you can go with Servo Schematic which will give you more artifacts. Or Incendiary Sabotage which will be a good board wipe that your heavy hitters can survive.
Workshop Assistant might also be good as a 4-of to keep Artifacts in your hand. 2 of them can keep recurring each other to really help grind out the game.
What are the best decks?
What sounds good so far is spells matter with Thermo-Alchemist and prowess. With 12 1 mana cantrips.
The other big contender is controll deck with Rise from the Tides.
I think both of those decks might be very obvius.
I was thinking maybe something like this.
4 Ravenous Intruder
4 Salivating Gremlins
4 Defiant Salvager
4 Fiery Temper
4 Implement of Ferocity
4 Implement of Combustion
4 Implement of Improvement
4 Terrarion
You have one more Uncommon spot and looking at it you can go with Servo Schematic which will give you more artifacts. Or Incendiary Sabotage which will be a good board wipe that your heavy hitters can survive.
Workshop Assistant might also be good as a 4-of to keep Artifacts in your hand. 2 of them can keep recurring each other to really help grind out the game.