Do the 'Smash' or 'Massacre' perks affect the Eviscerator's primary, alt and bash attacks?

Solution 1:

Based on the information provided by a Tripwire developer in this thread, Massacre will buff the damage of the Eviscerator's ranged attack, which is considered a light attack, while Smash will improve its headshot damage and stumble power. However, the hard attack bonus does not apply to the Eviscerator's melee attack, as this attack is not classified as hard or light.

All perk weapon modifiers apply to the Eviscerator, even its bash, as it's considered a melee weapon.

The evis has no heavy attack. The ranged projectile attack is considered a light attack, though. The bash isn't considered either light or heavy.

You get all the parry bonuses on all of the Eviscerator's attack modes, as it's considered a melee weapon.