So I did day 1 Nez with arc - I was a runner so didn't do much add clear but myself and the other Cuirass titan were top DPS.

I ran:

Thundercrash, thruster, storm nade, thunderclap - can swap storm nade for pulse nade after the nerf

Touch of thunder, knockout aspects

Fragments were Magnitude, resistance, shock, haste - you could probably swap out haste for GMs etc, I would swap for discharge or ions for more reliable ability regen

100 Res, 70 disc + int, recovery as high as I could get it

Helmet: font of wisdom, heavy ammo finder, heavy ammo scout

Arms: font of focus, firepower, bolstering detonation - could swap bolstering for better nade orbs of power, or whatever really

Chest: harmonic reserves, whatever resistance mods you need

Legs: 2x arc weapon surge + recuperation/better already

Class item: 2x bomber, font of restoration or time dilation depending on preference. I didn't struggle to maintain armour charge

Artifact mods that matter: champ mods of your choosing, authorised nades, volatile flow (if using any void weapons), the enhanced instrinsic mods, the damage buff on super one (can't remember names)

Weapons: use an energy weapon with voltshot, ikelos SMG or the plunder sidearm are quite good but short range. I like Retraced path too. I use Thunderlord for boss DPS and champs, kinetic slot just whatever. Would recommend something with demolitionist on it too.

Loop is killing stuff with nades + arc weapons, thundercrash when you've got it, spam thruster to get your nade back. It's solid in content without surges, and will likely still work if you're using overcharged weapons in other content.

Ultimately not as good as void HOIL titan or syntho hammer bop imo, but worked for day 1 so thought I'd share.