Is it possible to create a skill that deals a percent of the target's current vitality?

I'm having some difficulty understanding the behaviour of Damage: TargetCurrentVitality.

My skill currently is set up as:

Damage: TargetCurrentVitality
Damage Multiplier: 100
Damage Range: 0
Damage Type: None

In game, it deals 0-1 pure damage.

[b]EDIT 1[/b]
Setting Damage to TargetCurrentPhysicalArmor appears to crash the game.

Damage: TargetCurrentPhysicalArmor
Damage Multiplier: 99
Damage Range: -1
Damage Type: None

[b]EDIT 2[/b]
Might have been Damage Range: -1.

Trying with no Damage Range doesn't crash.

Last edited by Emraell; 19/12/17 02:16 AM.