Three copies of all the LIGHT Chronomaly's (except the Xyz) is always required in pure Chronomaly, no exceptions. They are far too good to pass up on three of. Nebra Disk: the core of the deck who keeps everything consistent. Some say this card is overpowered and needs to be limited. When it's Normal Summoned you get to search ANY Chronomaly card from your deck to your hand, except another Nebra Disk. Since it says “card” and not “monster” you can search the Spells too, which makes this card one of the best Archetype themed searchers ever created.
Not only is Nebra Disk an incredible searcher, it can also revive itself from the grave if you only control Chronomaly monsters, and you can only use Chronomaly effects that turn. Despite all the restrictions this effect has, it is a very powerful effect that enables us to OTK with just two cards.

Golden Jet gives us access to both Rank 4 and Rank 5 Xyz, thanks to it's incredible level increasing effect, very similar to Constellar Kaus. Jet is a very important piece to our two-card OTK combo. By having one of each LIGHT Chronomaly on the field (Bones, Skull, Disk, Jet), and using Jet's effect to make Skull and Bones level 4, and Disk and Jet level 5, you can Xyz summon both Fork Hoyuk and Machu Mech, then use both of their effects and attack for an easy OTK.

Crystal Skull is our second searcher, who can search our main searcher. If you have a Chronomaly on the field, you can discard Skull to add any Chronomaly monster from your deck OR grave to your hand. Since it can add from Grave too, you can use it to recycle Nebra Disk if used all three already. Also, if you have Machu Mech or Fork Hoyuk in your grave for whatever reason (used earlier, summon negated, destroyed, etc.), you can use Skull to add it back to the Extra Deck to be used again!

They say Nebra Disk should be limited, but I say Crystal Bones is the one who needs to be limited! Bones can Special Summon itself from the Hand if you control no monsters and opponent has monsters, and when summoned this way, Bones can summon a Chronomaly monster from your Grave or Hand! Need to go for a Rank 3? Summon Skull! Have jet in hand and need to go for a Rank 4 or 5? Summon Disk then Normal Summon Jet! Being a level 3 Rock-type Monster, Bones gives us access to the powerful Gorgonic Guardian, and the sturdy Giant Soldier of Steel! If you have Pyramid Eye Tablet active, Bones can give you two quick, powerful beaters instantly. Bones is also a very powerful backup plan. Let's say you Normal Summon Nebra Disk, and it gets Bottomless Trap Hole'd. Just Special Summon Bones from Hand, use it's effect, and go for an Xyz! Don't forget Bones isn't limited to Once Per Turn, so if the first one gets negated
I mentioned our two-card OTK multiple times already. Bones is the main reason we can OTK so easily. In order to pull this OTK off, you need Bones and Jet in hand, and Skull and Disk in the Graveyard. Special Summon Bones, use effect, summon Skull. Normal Summon Jet, Special Summon Disk with it's effect, use Jet's effect, then overlay Skull and Bones to summon Fork, and Disk and Jet to summon Machu Mech. Then use Fork and Machu's effects, attack, win. Just be very careful when doing this, since Disk's effect stops you from using non-Chronomaly effects this turn, so you won't be able to protect your OTK with Trap Stun.

Gordian Knot: The only decent EARTH-Chronomaly, which most people don't run. Knot is not as good as the LIGHT-Chronomaly, but it's still a valuable member of the archetype. When Normal Summoned, you can Special Summon a Chronomaly from your hand, then Knot's level becomes the same as that monster's. This let's you have powerful early game plays if you haven't got your Nebra Disk to get the ball rolling yet. If you summon Jet, you can use Jet's effect, then go for a Rank 5 Xyz. If it's turn 1, I'd recommend summoning Freezadon, then Full Armored Crystalzero Lancer. 3700 ATK and self protection is an extremely powerful turn one play.

City Babylon increases are already incredible grind game, give's us more ways to make late game pushes, and makes OTKing easier and safer.

Pyramid Eye Tablet turns our monsters into tyrants. Searchable Solidarity with no restrictions? Yes please! Turns Nebra Disk into a 2600 searcher, Jet and Bones into 2100 Beaters, Fork into a 2800 beater that can drop a monsters attack to 0, Machu Mech into a 3200 beater, and even Skull into a nice 1700 beater, if you're in a situation where you simply have to summon it, or if you want to strike your opponent with it and Bones before making a Rank 3 Xyz.

Soul Charge: This card obviously helps us do our OTK, and safely since we'll be able to use Trap Stun to ensure that it goes through (unless your opponent has Effect Veiler, which just about nobody is using this format). Just keep in mind that you won't be able to attack this turn, since Soul Charge doesn't let you conduct your battle phase this turn, but if it's late game, your opponents life points should be low enough for Machu's eff itself to end the game. If not, try to summon Machu Mech, Fork Hoyuk, and Volcasaurus (or just Machu and Volcasaurus if you have Ghost of A Grudge set/activated).

Ghost of A Grudge: Some people think it's not even fair how much Chronomaly can make opponents attack points 0. Well guess how they will feel when they see you activate this? You don't have to run this card, or you can try it at 2-3, this just a personal tech I like to run, because it combos nicely with Ragnazero and Machu Mech, and even if you can't summon Ragnazero or Machu Mech, late game, Ghost of Grudge can end games since your opponents life points should be around 2000 or lower, and you'll be able to just attack them with Nebra Disk or something else for game. Always remember that the attack drop is PERMANENT, so if it's targeted by MST, always chain it, and don't be afraid to use it in your opponents turn when you don't have a game ending play ready.

Fork Hoyuk: Fork Hoyuk is our themed Starliege Paladynamo on steroids. Only uses one material, so you can use it's effect twice, and can be done in either players turn, including the damage step. I only use one Fork Hoyuk because I don't go for Rank 4's often, Extra Deck space is tight, and usually, one is all you'll need, unless your focusing your deck primarily on dropping opponents attack to 0 (which is a perfectly viable strategy considering how much we can do that). Feel free to drop something from the Extra to add a second Fork.

Machu Mech: Our boss card. By detaching one Xyz material and targeting a monster with attack different from its original attack (usually will be 0 from Fork, Gorgonic Guardian, or Ghost of a Grudge), Machu will inflict burn damage equal to difference in attack points AND gain that amount of attack points. After that, you can attack the 0 ATK monster for massive damage. Let's say opponent has a 1800 ATK monster on the field, with 0 from Fork or something else, and you use Machu then attack. That there is 6000 damage from one monster! Then if you attack them directly with Fork, you just did exactly 8000 damage in one turn! So, as you see, Machu Mech almost always wins the game when summoned.

Fortune Tune: One of the reasons we have such a great grind game. Fortune can stall for a little bit while restoring your life points, and will go back to the Extra Deck when its destroyed, and also recycle two of your level 3 monsters, which lets you reuse your Crystal Skulls for more endless searching and recycling, or your Bones if you need them back. Since it goes back to the Extra Deck, you can grind with this card multiple times in one game.

Giant Soldier of Steel: EPIC grind game card. This card is EXTREMELY underrated, yet I can't tell you how many games this card has won me! 2000 DEF itself can be hard to run over, especially backed up by backrow, and it can boost that 2000 to 3000 for one turn! Don't forget that he's immune to other monsters effects, so your opponent will not have an easy time getting rid of him in any way other than battle, unless they Dark Hole or Compuls it, or chain Breakthrough Skill to his effect. Sitting on this card and backrow until you draw the resources you need can and will win you many games, especially against control decks like H.A.T.

Gorgonic Guardian: Very powerful card. It's effect can be used to negate monster effects in your opponents turn, and can also run over anything due to dropping monsters attack to 0, and negating their effects means it will bypass any built in protection that monster has. If your afraid your attack is going to be ruined by something like Mirror Force or Dimensional Prison, just use the second effect to destroy the opponents monster!