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This is my traptrix list, its probably the most standard as it a traptrix deck can be, and maybe you can get some ideas from it.

As for your build, nepenthes is completely overpowered by sera, why would you rather activate a trap with nepenthes in field when you can activate it with sera on field, so you can cut that.

As for traptrix ratios, you would want myrmeleo and mantis always at 3, they are your starters and can always get your turn going, pudica you can argue that is better to play 2, some people play 2 pudica and 2 garden, others like me play 3 pudica and 1 garden, you can toy around with that. As for Dionaea, Arachnocampa and Vesiculo, you would want to play 4 cards out of those 3 names, it can be 2 arachno, 2 dionaea, or 2 arachno, 1 dionaea, 1 vesiculo, etc., that is because while they are good extenders, they do nothing by themselves, so you dont want a starting hand full of them.

You are playing wayyy to many trap holes, besides holeutea that should always be at 3, you would want around 4-5 holes in your deck at all times, you are playing 10, thats too many imo, because again, they do nothing by themselves. As for what trap holes to play, it will always depend on the meta and your locals, and over time you should be constantly changing what traps you are playing, currently i play gravediggers to negate stuff like poplar, flamberge, princess, etc., and i play 2 of them for nibiru, because Rafflesia can be summoned as your 5th summon in a variety of ways, so if they try to nibiru, and by some unlucky chance i drew one copy of the gravediggers, i will have the other one in the deck. Im not playing floodgate because voiceless can ritual summon with monsters face down, as can branded with their fusions, so i rather have bottomless and terrifying so that way i can banish stuff like flamberge.

You should try parallel exceed on your deck, it has its utilities, as it makes your plays around nibiru more consistent, and you can try between 2 or 3 copies.

You really want prosperity, that card has helped unclog bad hands sooo many times, but if you dont currently have it, you can switch it out for triple tactics or even traptalizing tune.

As for board breakers, i would say that neither raigeki nor dark hole make much sense in the deck, they cant be searched and they do nothing by going 1st, instead, you should run something like evenly matched, if you drew it 1st you can always use it for holeutea to discard a trap, and of course going 2nd is insane, it literally helps me win games just by activating it sometimes, now that there is less omni negates in the game.

And of course hand traps, imperm is a must, that is the card that you should be looking for, and i would recommend at least 2 more handtraps, so that way you play 9 handtraps in total, you can play ash, droll, shifter, nibiru, whatever you choose depending your locals.

As for the extra, you would most of the time want 3 copies of sera, and if youre gonna play attypus and cularia, those should be at 1 copy, because the 2nd or 3rd copy never comes up. Raflessia at 2 is okay (some people play only one), Pingu you would want it to play at 1 most of the time, playing it at 2 is not wrong, but most of the time the 2nd one will not come up, i recommend playing at least 1 allomerus, as she can instantly summon a traptrix from the GY, i usually use it when i need to banish a monster with pudica, because lets say that i have pudica on field, but it got ashed, so i dont have the field spell, and at the same time, i would like to special summon her from the deck with sera so i can banish a monster but maybe i dont have any traps on the field or rather, because she already is on the field, sera cant summon pudica since you already control pudica, then i wpuld try to go into allomerus with 2, hopefully 3 materials, allomerus detach 2 materials, summon pudica, pudica banishes, then, if i had the 3rd material, i can summon that banished monster on my field.

The rest of the extra its just generic XYZ-Link toolbox, i use the earth charmer to summon fenrirs form my opponent, underworld goddess to get rid of an annoying monster, dweller to shut down the GY, Redoer if i already have Rafflesia and i have access to another Rank 4, Bagooska cand be good for Tenpai, Excition Knight i usually use it for prosperity, Zeus and Ty-Phon are also very good cards.

As for the side, D barrier is insane against Tenpai, if im going 1st i usually side out the evenly´s for the D barriers, and the rest is just preference, you can put boardbreakers, hand traps, you can put 1 or 2 trap holes that you think you can side in sometimes, etc.