Reducing duration time for an ability casted multiple times

[aitz-]

hi, in my map i want to make an ability reducing the duration time if it's casted multiple times on a specific unit.

I tried to make it but it's kinda hard to make it, if someone could help me it would be nice

Thanks.

here's the trigger.

• SlayerGrip
  • Events
    • Unit - A unit Begins casting an ability
  • Conditions
    • (Ability being cast) Equal to Grom's grumpy Grip
  • Actions
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
      • Then - Actions
        • For each (Integer A) from 1 to (Number of players), do (Actions)
          • Loop - Actions
            • Unit Group - Pick every unit in (Units in (Playable map area)) and do (Actions)
              • Loop - Actions
                • Unit - For Unit (Picked unit), Set cooldown of ability Grom's grumpy Grip , Level: (Number of Negative buffs considered Magic or physical on Vamp1 (Include expiration timers, Include auras)) to 5.00
                • Unit - For Unit (Picked unit), Set cooldown of ability Grom's grumpy Grip , Level: (Number of Negative buffs considered Magic or physical on Vamp2 (Include expiration timers, Include auras)) to 5.00
      • Else - Actions

edit : NVM i just reduced the spell duration for every players (easier i think)