[Raigen.Convict]

[Name Pending]: (dagger only) Cut at the weak points in your targets armor. Can only be used from behind an enemy and within 1 tile. Basic attacks the target and removes armor based on the targets armor class for rounds based on rank and target armor class.
Rank 1: 20 FP Removes 5%/10%/20% armor for 3/2/1 rounds for Unarmored/Light Armor/ Heavy armor
Rank 2:15 FP Removes 10%/20%/40% armor for 4/3/2 rounds for Unarmored/Light Armor/ Heavy armor
Rank 3 10 FP Removes 15%/30%/60% armor for 4/3/3 rounds for Unarmored/Light Armor/ Heavy armor

Trap Mark: Equip passive: (cannot stack with archer's trap mark skill, the one first equipped in the skill list will take effect): Upon an enemy being hit by a trap laid by you, they are marked. Basic attacking marked targets grants +30 hit, crit and 10 damage against them for one attack. If this attack is done from behind it is guaranteed to critically strike.

Spit-ballin' ideas is all.