This is a generic build, it can be specialized for the 2 meta frames for even more damage:
Saryn: Replace Polar Magazine with Critical Focus/Riven
Chroma: Replace PRubedo-Lined Barrel with Critical Focus/Riven.
These replacements increase damage because that frame can give buffs of the same type as that mod, making their relative bonus tiny compared to other mods.
[Ammo Chain] halves the cooldown of your Archgun deployer (cooldown depends on % of your total ammo you've used), but [Mausolon] has such crazy ammo reserves that you generally shouldn't even need it.
PT builds:
Saryn/Chroma/Wisp
Zenith
Kuva Nukor
Contagion Zaw
Mausolon
Smeeta(for credits)/Adarza(for speedruns)