Since it has been my favorite deck since release I've decided to share it with you.
I am playing them with the Symphonic Warrior engine, Genex Undine and a focus on revivability.
The Symphonic Warriors grant you an additional normal summon and a free level 5 machine type monster which you can use with Sulfefnir to go into Infinity. The "Garnet" itself ain't that much of a brick if you draw it, since tribute summoning him gets you the additional normal summon aswell. Try to get him into the grave instead of the extra deck afterwards if you can because you can revive him with the smaller Symphonic Warrior and get the effect again.
I also play Genex Undine since the mill from the deck is a cost and cannot be negated. Genex Controller can become a hard brick sometimes.
I am only playing 1 Halqi even though he is unlimited in TCG because I basically have 5 revives for him from which I can search 3. Because of Halqi I also play T.G. Wonder Magician who's an MST on summon and can also synchro summon on opponent's turn.
I have played Sulfefnir at 3 for the longest time and have just been experimenting with 2 for a few weeks. So far I do not think I have lost any consistency but instead have less dead cards in grave/hand.
Playing 6 handtraps can be bricky at times but you kind of have to play at least a few in the current state of the game.
The Ice-Bound God is a better Lost Wind in this deck.
Unchained Abomination just works perfectly.
Dragite or Dawn Dragster should always be on your field. Even better if you have an Infinity on their side.
If you want to start playing this deck I cannot recommend enough to only us the non-tuners field effect if you really have to since it locks you into only Synchro machine type monsters.
All in all I can really recommend this deck to anyone playing on locals-level. It is fairly consistent, has a great recovery and it's not a helmet deck, so you gotta use your brain.