Here's in my opinion, the best Traptrix build with the synchro pacakge (Banshee, Agnimal and a synchro monster).
___Main Deck Explanation___
-Core of the deck : 3xTraptrix Pudica , 3xTraptrix Myrmeleo and 3xTraptrix Mantis are mandatory, (they're your starters, you have full combo with Traptrix Pudica and Traptrix Myrmeleo for example). 2xTraptrix Dionaea (1 to special from deck and set a trap, the second for mid game extender), 1xTraptrix Arachnocampa and 1xTraptrix Vesiculo (one of each as extenders for different situations). 1xTraptrip Garden (no need for more because of the 3 Traptrix Pudica), 3xTraptrix Holeutea mandatory, and 4 trap hole (2xGravedigger's Trap Hole in case you draw one and still need protection against Nibiru, the Primal Being (or any other hand trap) with Traptrix Rafflesia; 1 Traptrix Trap Hole Nightmare, the best one; and 1 Bottomless Trap Hole to counter Fallen of Albaz, Snake-Eyes Flamberge Dragon, and many others (this one can be changed for any other trap hole or even totally removed)).
-Hand traps: 3xDimension Shifter is your best card, shutting down every meta deck (except Branded and Floowandereeze, that's where Bottomless Trap Hole helps :)), playing Dimension Shifter implies playing hand traps that *discards* themselves and not *send to the graveyard*, that's why we play 3xAsh Blossom & Joyous Spring, 2xGhost Mourner & Moonlit Chill and 2xGhost Belle & Haunted Mansion. Of course we have 3xInfinite Impermanence.
-Other : 2xTriple Tactics Talent for draw power instead of Pot of Prosperity because you need your extra deck. 1xAgnimal Candle for synchro summoning, 3xEvenly Matched in case you go second first game, and because you can discard it doesn't brick you.
___Extra Deck Explanation___
-Traptrix : One of each Xyz, 1xTraptrix Atypus to push for game, 3xTraptrix Sera best card overall.
-Other : 1xInfernal Flame Banshee (to search and summon Agnimal Candle), 1x a synchro monster (It should've been Baronne de Fleur but it got banned LOL, so for the list's sake I choose another Lvl 10 synchro boss monster), 1xTime Thief Redoer (to make with Traptrix Holeutea for full effect), 1xNumber 41: Bagooska the Terribly Tired Tapir for the grind game, and 1xDivine Arsenal AA-ZEUS - Sky Thunder. I choose to play Number F0: Utopic Future and Number F0: Utopic Draco Future (took the idea from Duel Evolution in their video https://www.youtube.com/@DuelEvolution ),
making them in the combo using the two leftover monsters. But for a budget friendly combo, thesee can be replaced with I:P Masquerena and Knightmare Unicorn. Finally 1xKnightmare Phoenix for more backrow removal (and to draw one when co-linked with Traptrix Sera).
-Alternative synchro monsters : Instead of Swordsoul Supreme Sovereign - Chengying, you can play Virtual World Kyubi - Shenshen, Draco Berserker of the Tenyi, or if you only want to synchro turn one, you can consider playing F.A. Dawn Dragster. I prefer playing a level ten in case I have to normal summon Dimension Shifter and synchro right away (thus making him relevant again in mid game).
___Side Deck Explanation___
Going First : 3xParallel eXceed, same as Nibiru, the Primal Being I don't like to draw it when I go second, so I side him in when going first. 1xCalled by the Grave if needed. 1xAnti-Spell Fragrance is just too powerful. Thankfully it got limited, but it is still very revelant in this spell-free deck (and look we're maining shifter so we don't need to pretend that this isn't toxic already...) 3xDimensional Barrier to defend against Voiceless Voice, Branded, or even the new Tenpai archetype.
Going Second : 2x Nibiru, the Primal Being, with shifter and evenly I don't think 3 is necessary, but you can still play 3 if you prefer (especially after this banlist making it stronger than before), and I don't like drawing it middle game, so I play it when I'm going second. 3xDroll & Lock Bird, not in main deck because not compatible with Dimension Shifter, but you can change them when siding. 2xLightning Storm for backrow removal (with a spell instead of monsters).
___Deck Combo___
Here's the best video to learn to play this deck (from Duel Evolution) : https://youtu.be/u8uiYzc4Meg?si=uTyC9_VxZWjI-WZp
It was way before the banlist but the idea is still the same (but this time without Baronne de Fleur).
I hope that helped ;) Enjoy !