Seems fitting here to remind people just getting used to modding that Heavy Caliber should almost never be used. And should NEVER be used along with Serration in the same build.
The only use for HC is when you want to spread damage widely. Mutalist Cernos or Ogris. And that’s about it.
The conditions for the +dmg/-acc corrupted mods are basically "high accuracy, low crit, low status". I use Magnum Force on Hildryn's Balefire.
Stacking base damage always grows linearly, which can beat crit on weapons with bad crit stats, and can beat status on weapons with low status chance, but will very rarely beat both, and usually on very old weapons.