Build I'm using to speed clear maliwan takedown solo (m4 tvhm), Should work for mobbing/bossing as well with some weapon changes. Shout out to ThiccFila, go give him some love on youtube. He helped me become a better zane player.
Weapons used in my clear videos
Corrosive Redistributor with 50% shock ase (action skill end)
Corrosive Ion cannon with 100% damage ase
Corrosive cutsman with 50% shock ase
Shock cutsman with ase next 2 mags corrosive
(These are the main weapons, any variation of elements and anointment's should be fine, build just benefits with more element/damage ase. Even having one ase element will make the redistributor a beast). (I also run a Maggie with barrier accuracy and crit anointment, A fire and shock dictator with element ase's, and whatever else fits the bill for the boss I'm farming)
Equipment used in my clear videos
band of sitorak with 50% radiation ase
It's piss with 50% cryo ase
Seein' dead class mod with (3 donny brook, 1 violent violence and 1 playing dirty)
Electric banjo relic
(The goal is to mix different element types to be able to shred through all three health types, there's no need to have the exact equipment with the same ase as mine as long as each has a separate element)
Play style is pretty easy. Your goal is to keep your barrier up with the seeing dead class mod while spawning and detonating your clone to activate all your action skill ends. If there are 2 or more enemies close together your redistributor will absolutely shred anything nearby with the constant gun and banjo chaining. This constantly procs the class mod which triggers all your kill skills and makes you a death machine. Corrosive Ion cannon is for Valkyries and Wotan's better half. Cutsman is an insane single target shredder, but more for slower big enemies like kraken and Wotan himself.
The reason behind the band of sitorak is simply it's low capacity and high recharge rate. It allows us to take full advantage of adrenaline to keep spawning our clone and dopplebanging to get our ase's. If you have the guardian reward shield reboot, the shield will barely be down. Other shields should work fine, I initially ran with a stop gap for a more defensive play style, but there were too often times I'd be waiting for my cool downs to come back from the low recharge rate. So try and prioritize a fast recharge rate/delay shield.
Link to my current time (8:32) https://www.youtube.com/watch?v=Zk4U3kiC9Hk