You have your discs to fire from alternate abilities. Try this.
Code:
holyshit3=/if (${Target.CurrentHPs}<99 && ${Melee.Combat} && ${Me.CombatAbilityReady[Thief's Eyes]}) /disc Thief's Eyes
holyshit4=/if (${Target.CurrentHPs}<97 && ${Melee.Combat} && ${Me.CombatAbilityReady[Assault]}) /disc Assault