The *fixed* stag carnage from the community patch is applying single target debuffs like blinding strike to all the enemies inside the carnage aoe. Does anyone know how to change this to make it work like the regular barbarian carnage?

Carnage works via ApplyStatusEffectToEnemyOnEvent --> AttackTargetOnEvent [Primary], for attacking with the primary weapon, and then again for a "Secondary" in the AttackOverrideValue.  All of this is in the StatusEffects gamedatabundle. 

 

Not sure how the stag carnage applies all the effects to everyone but they might have changed the stag's melee attack data to be an AoE that deals less damage (if it wasn't before) and that would spread all the effects in that way.  This would be instead of the way Carnage works, because Carnage has to deal with whatever weapons the player chooses to equip in either slot.  The stag doesn't equip items, so they probably didn't even make it like Carnage.