Mostly belt-based design to create Power Armor Mk. II, Spidertrons, and all the equipment grid items needed to fill them up (power, batteries, roboports, lasers, sheilds, exoskeleton legs). Uses buffer and requestor chests to pass around expensive low-throughput items and to pull in expensive/slow intermediates like modules and RCUs if they're in the logistics network but with machines to produce them if not available.
This build should also provide enough first tier modular equipment if built earlier in the research chain, along with caching the resources required to build tier 2 equipment later.