Notes & Combos
This is one of the most fun Krawler lists I've ever played. I'd go down to 45 cards, but all of the in-engine stuff feels too important to cut down and I still want enough going 2nd tools.
Girsu combo: send Mind Meld, summon tokens, make Lib, set Pawns, summon Deus X.
Off Nadir Servant, you usually search Maximus so you can set up Apkallone + Resh Shaddoll Incarnation in GY.
I started trying Dogmatika stuff in Worm, since I needed a secondary engine that doesn't need the normal summon. I experimented with in Krawler in the same way, and it feels very nice. Dogmatika cards can send Apkallone to the GY to send Resh Shaddoll Incarnation, which lets you quick flip your Krawlers.
The extra deck has a bit of flex space. The third N'Tss, Mereologic, and Skull Wagon can be substituted out for other options, but the rest all feel very important. You might want Zeus in here, if anything.
Gamma, Driver, and Gadarla are important bridges to make sure most of the cards in here can access Soma, Girsu, or even Ecclesia and Maxx "C".
LV2 Krawler/Maxx/Any Dogmatika -> Gamma -> Girsu
Gamma/Driver -> Ecclesia -> Girsu
Krawler/Maxx/Lv8 Dogmatika -> Gadarla -> Soma
Gamma/Driver -> Fleur -> Soma
Etc, etc. I don't think Ash can Small World into anything useful (Ash -> Axon -> Gidarla, I guess?), but it never came up.
If you have any other questions, contact me on the Master Duel Meta Discord or DM me @querymarks on Discord.