This build focuses on maximizing both some for the road uptime, action skill start, and action skill end 100 or 160 splash anoint. These anoints have always been in the game but relatively clunky for Moze to use but with this setup, you are able to take full advantage of it.
Action Skill: Iron Cub
Alternate Skill Tree Options/Flexibility:
What makes this build (and others like it) work is the Eternal Flame COM from DLC5. This COM allows you to quickly get Iron Cub back after he goes on cooldown. Combining this with having Iron Cub kill itself with its own gun (and thus go on cooldown) lets you chain ASE/ASS anoint activation for maximum uptime on damage anoints that Moze previously had trouble keeping up.
All guns listed can be good with consecutive hits or 100% action skill active, if the gun has extra anoint flexibility it is listed.
For the shields, you will be looking at any ASS nova shield that you can get your hands on.