[Xero Shade]

I was under the impression that all crits do 1.5x damage of normal attacks.
Critical Hit! (Insert name here) attacks Rock-Solid Firefox with -------- and hits them!
Rock-Solid Firefox takes 206 Pierce damage.
The Mellow Mismatched Eye Man's turn.
The Mellow Mismatched Eye Man: The Void's Will (20 Power)
Hit: 121.85%
Dmg: 89
Crit: 46.75%
(Insert name here) attacks Rock-Solid Firefox with --------- and hits them!
Rock-Solid Firefox takes 102 Pierce damage.
The Mellow Mismatched Eye Man's turn.

Here, that's more like 2x (and some change) of an attack. These were both back attacks, performed with one using Cutthroat (the second) while the first was a basic attack.
When tested again..

Critical Hit! (Insert name here) attacks Firefox with --------- and hits them!
Firefox takes 216 Pierce damage.
The Mellow Mismatched Eye Man's turn.
The Mellow Mismatched Eye Man: The Void's Will (20 Power)
Hit: 131.05%
Dmg: 93
Crit: 50.15%
(Insert name here) attacks Firefox with ------------ and hits them!
Firefox takes 106 Pierce damage.

This time, it wasn't against a mini-boss, and the second attack was, once again, a Cutthroat. And, still, the first attack deals 2x (and some change) of the Cutthroat, yet Cutthroat is still performing a simple basic attack with a hit deduction. Intentional?

[Lolzytripd]

that skill... that void assassins get, increases dagger crit damage by 50%, making it 2x

[Xero Shade]

Ah, alright.