Notes & Combos
This is the list I ended up using the most after Lars came out. I had a harder time to go through Diamond then Master. I spent most of my time between Diamond III to I, don't know exactly why but people were playing better there. I actually got a really nice 10 win streak with the deck to go from Master V to II
But let me explain some choices of the build:
3 Petit: Basically more consistency. Dinos brick as **** as everyone knows and that's a big problem, so having 9 babies(3 baby, 3 petit, 3 fossil) + 13 ways to pop the babies(3 misc, 3 ovi, 3 fossil, 3 ground xeno, 1 arch) I maximize my chances of opening a combo hand. I have exactly 61.5% of chance of having any of these combos going first. 65.5% if I count Pot of P. as a piece of the combo as well. Basically each less baby you have you diminush your chance of combo in 4%. And each less 'pop the baby' card that you have you diminush it in 2%. So playing only 1 Petit as a lot of people do means a 57% chance of combo, which is far from good. So I'd recommend 2 or 3. Small World can help the math even more
1 Arch/2 Pills: This is really personal preference. Technically if you play 2 Archs you make the deck even more consistent going first (around 2%, as I said), and you basically dont have to face a situation where you cant special summon Arch from your deck with Misc bc it's very rare that both copies are on your hand at the same time. However, I chose to play this ratio bc you also want to draw handtraps going 2nd, and having less cards makes it more likely and after testing I didnt find that playing only 1 Arch was making me lose any games. Regardin the Pill, I really didnt like playing it at 1, bc when you draw it its generally much worse then when you draw your single Arch
HTs: I started playing 3x Maxx, 3x Ash, 2x Gamma, 1x Imp but didn't like it, cause Gamma just adds Driver which is another brick, and more often than not it is a brick itself if you need to normal summon Ovi/Arch on first turn, and after all I wasn't resolving it as much as I thought I would. So I changed it for 2 Nibs and 1 extra Imperm and that worked much better for me. Nib felt really good in the current format in my opinion, specially bc NOBODY seems to respect it in ladder, so people just keeps summoning even when they already have game sometimes. Using Nib at the right time made me win some really tough matches. I also tested SuperPoly, which is good but sometimes felt not enough or too late
That's it :)
Replays
Top Secret Packs used

Very rarely, if you feel like cutting it you probably won't miss it. But there was one duel where I was bricked or got stopped, I can't recall correctly, that I wasn't able to combo, and having him allowed me to go lethal using UCT for the fusion requirement, and then re-adding UCT back to hand, summoning it again and finishing game.

Or is it 3 divide 0.41= 7.3 x by 7= 51.1% 1 divide 0.41= 2.4 x by 2 = 4.8% 55.9 % total My brain is fried

You don't need to do any math, just go to www . yugioh . party and use the hand calcullator tool that they have. But the 65% is not about opening misc, ovi and baby, is to open some form of baby/petit and some form of popping them

Would Triple Tactics Thrust be good in this deck? If your opponent has a monster you can add Fossil Dig, Ground Xeno , and Prosperity to your hand to boost consistency. Also has some synergy with Lost World if you chose to play that.

It's not bad, but you would probably need to take handtraps out to put it in the deck, and I don't think it's a good trade. Lost World I also think is not that good currently, because SE is very popular and they use it for Linkuriboh. I think I would only use Lost World again with the Scrap Engine

@hayashii I need a bit of help Iam using a 44 card build with 5 baby giant rex kaitoptera polymerisation lost world and ecole de zone but currently I’ve been stuck master 5 for 2 days jut losing goign secodn 8 times in a row and maxx c going first I need to know shoudl I take out giant rex ecole small world and 2 super poly and add 2 nib 1 more petite and 2 imperm

I'm not a big fan of the Kaitoptera and poly stuff, it opens up more plays but also adds potential new bricks, also if you use it, then you don't need Giant Rex as well, if you use one you generally don't use the other.
If you're losing a lot going second you should try to put more going second cards and/or hand traps. If you're losing a lot to Maxx C you can try adding Gamma, but as I said earlier, I preferred going with Nib and an extra Imperm cause it worked better in ladder. I think Gamma is better for a tournament environment or something.

Not much to be honest, it's defenitely low in the rank of importance of the extra deck in my opinion