[Trigger] Unit Group ability changing.

[Squid1313]

Right, here is my trigger:

• Helping Squid is fun
  • Events
    • Unit - A unit Finishes casting an ability
  • Conditions
    • (Ability being cast) Equal to Dazzling Brightness
  • Actions
    • Unit Group - Pick every unit in (Units within 300.00 of (Target point of ability being cast)) and do (Actions)
      • Loop - Actions
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • (Level of Weapon Skill 2 for (Picked unit)) Equal to 1
          • Then - Actions
            • Unit - Remove Weapon Skill 2 from (Picked unit)
            • Unit - Add Weapon Skill 1 to (Picked unit)
            • Wait 12.50 seconds
            • Unit - Remove Weapon Skill 1 from (Picked unit)
            • Unit - Add Weapon Skill 2 to (Picked unit)
          • Else - Actions
            • -------- This tigger repeats for weapon skills up to 10. --------

It is not working, I know why, so please dont post about that, but I cannot find a way to do this using GUI tiggers that works.
In more depth: This spell is meant to set the units weapon skill to 1 for 12.5 seconds then revert it back, weapon skill is an ability (duh?) like evasion (if that helps). The spell is based on drunken haze.
I will love the person who can help me with this forever (this will also solves multiple other roadblocks). Oh and GUI is preference (although I could try relearning C++).