Hateful Chain only doing 2/3 of tooltip damage

I just got a Hateful Chain out of the Vault and was messing around with it when I noticed it’s not doing its full tooltip damage. https://cdn.discordapp.com/attachments/721931080684404797/793610435140124702/unknown.png.
The only nerfs I found on this trinket was the one to healing when vs. enemy players.

Are you accounting for armour? It’s physical damage, and most NPCs have 35% worth of reduction base-line.

Yea that’s probably it. Our Monk tank has one, and it fluctuates (~450 dmg-650 dmg normal dmg). Looking at his toolkit, Kyrian monk increases the damage enemies take when hit with their ability, which explains the difference. Didn’t think some covenant abilities boost covenant dmg, since necro dh flat 30% doesn’t enhance anything outside of their own abilities