Basically I wanted something that fits my playstyle with the new class mod and I think I found it. Haven't tested on bosses but for mobs I gotta say I'm really loving it. While you don't have the sturdy protection of the barrier or CCC build, with perma upkeep of your action skills due to seeing red constantly proccing Good Misfortune as long as you're hitting something you can perma keep your action skills up as long as you keep attacking enemies.
Mobbing and Bossing
Com: Obviously Seeing Dead, points and perks depending on your playstyle. I do recommend enough points in seeing dirty for the 100% chance of extra bullet. Anything else can be of your preferred skill. I recommend 3 donny and 2 playing dirty at the minimum. Bonus stats on the class mod can be of your choosing, such as weapon damage, damage reduction, manufacturer weapon damage etc..
Radiation/xx Ion laser : For general mobbing, I can kill pretty much any regular mob with this, even while they're shielded.
Shock Weapon: For boss shields if any, such as the cutsman, or any shock weapon of your choosing.
Corrossive: The autoaime is really good, especially on your clone for dealing with boss armor, corrosive cutsman is also really good too
Fire: anything works, if you can get a fire/radiation icon laser, this could free up 2 weapon slots as the ion laser can get 2 elements at the same time and it seems that it can be for any 2 elements.
Kinectic/normal: I really like using the ion cannon, preferably 20kx2 for maximum damage output. The icon cannon can roll any element but I prefer normal/kinetic due to elemental only going as high as 16-17k 2x. This is the primary weapon I use for my clone most of the time as it can just destroy any regular enemy.
Shield: I don't think there's a best shield, but whatever you feel comfortable using. If you need your shield recharged, swap to clone to get health and your shield instantly recharging. I use an anointed rico shield, try to get a rico shield with a 3rd line reflect 15% while shielded. I'm not sure if its just with this shield in particular I notice reflected bullets do in fact do no damage to you while shielded. Others have reported not having a similar experience but while I'm playing I notice that it does in fact negate damage. Great general purpose shield, if you're patient I suggest farming one out that has an annointment of your choosing but anointments aren't needed with my build, as I don't use any and I can farm mayhem 4 just fine.
Grenade Mod: Anything that fits your playstyle. I use the piss grenade as it debuffs enemies so they take extra damage, and with seeing dead class mod, you'll be popping fractal frags like crazy which will keep enemies debuffed just about all the time.
Artifact: Anything that fits your playstyle. I would say weapon damage is pretty good, and maybe elemental damage of your choosing.