Factorio

Have you thought about smelting on patch? Make the miners deposit the ore directly into electric furnaces, then have the bots pick up the output. It saves one trip, or 2 with steel.

Then I would segment the bot networks by purpose.
One for the base, one for each ore outpost where possible, and another to link the outpost to the main base. You can use a series of requestor chests, inserted arns, and passive provider chests to bridge the bot gaps.