This is a build I worked up for Zane to be able to switch Action Skills at will and still see full effect from any of them.
This started with Moxsy's Shadow Clone build with some minor adjustments to the trees. Not sure if anyone has posted this exact build before, so please let me know if someone has so I can give proper credit. Onto the gear…
Gun #1: Radiation Light Show w/ SNTNL Anoint
Gun #2: Radiation Burst Sandhawk w/ SNTNL Anoint
Gun #3: Radiation Monarch w/ SNTNL Anoint
Gun #4: Robin's Call w/ SNTNL Anoint
Shield: Transformer w/ Movespeed Anoint
Grenade: Shocking Fish Slap w/ +150% Grenade Dmg
Artifact: Cutpurse Victory Rush
Class Mod: Seein Dead w/ +36% AS Dmg
I primarily run Clone n Drone with this build, but if more survivability is needed (has happened with more challenging bosses) I swap to Clone n Barrier to keep help with the damage reduction and use weapons with the +130% Dmg Clone anointment to ensure my damage stays high enough, or to Drone n Barrier and keep the SNTNL Anointed weapons on hand for maximum damage.
I spawn the clone with a copy of the Sandhawk and run everywhere else with the light show. If shields and health get a little low, swap places with the clone to get a small boost to the shields thanks to Quick Breather. If for some reason you go into FFYL, use Old U to jump right back into the fight, the points in Adrenaline ensure your clone won't be out of commission for long. Once the battle is over, use "Doppelbanger" to save as much cooldown as possible and the time spent looting will bring health, shields, and action skills back to full before charging head first into the next battle.
The Cutpurse and Fish Slap grenade keep ammo pretty well topped off, and the damage output is high enough to make short work of almost any boss. The points in Rise to the Occasion helps avoid needing health vials. I completed Maliwan Takedown in almost record time using this build.