Domain - Superheavy-Machina-Roid-Symphonic-Karakuri-Springans

This deck focuses more on the novelty of including several unconnected machine archetypes into a scrap heap of gimmicky interactions, rather than being competitive. Machina is the crux of the deck, with Gearframe kickstarting all the plays essentially. From there is where the other archetypes vary your combos. Superheavies are the most consistent, providing either a Rank 4 or Level 8 Synchro play. Springans (along with C. Sargas) provide either more field presence as well different forms of disruption. Symphonics offer pend scales and general field presence. They help with synchros and have pretty good removal when you have counters set up on their spells. Roids are the funny gimmick portion, Mixeroid provides Rank 4 plays or a big body (Special summon Armoroid), Express recycles either fusion materials or Machina food, Dragonroid adds consistency, and the rest serve as discard fodder or fusion mats. 

If you wanted a "better" decklist, remove the fusion and roid stuff to make way for other staples or machine goodstuff.

Anyways have fun ig.