Skill : Unlimit : Ranger

[rituel]

Hello,
 
I have a problem with the skill "unlimit" job Ranger. 
 
Example: 

• When I launch "Arrow Storm Lv.5" without using "Unlimit" on monster 'Seal' for example. 
  

5880 HP 
 

• When I launch "Arrow Storm Lv.5" with "Unlimit Lv.5" on monster 'Seal' for example. 
  

11478 HP.
 
Unlimit: 
[Level 5]: For 1min, Increase physical ranged damage by 250%
 
 
Thank you for your help
Cordialy.