Same old Mathmech with a couple of new tricks. The new Firewall link-5 is a new OTK enabler, when Update Jammer+Accescode doesn't cut it. It can also be made going first to send some disruption from the extra, but i prefer drawing some cards with Heatsoul+going for I:P (into Apollousa later).
Ghost Belle is a new inclusion and can be a lifesaver against Bystials/Called by, which are probably the biggest weakness of Mathmech rn. Also it's pretty searchable with Small World. Speaking of Small World, it's really crazy in this deck! You have a lot of bridges that can fetch you most handtraps you need.
In the side are some other options you could consider. The @Ignister synchro+Mereologic Aggregator are things you can dump with Firewall and Nabla+Final Sigma is a third OTK option, if you're feeling like a giga chad :)