Weather effect trigger confusing the crap outa me. :(

Ok, those of you who play WoW will know what i'm doing here. I have a boss called "Heigan the Unclean". Infamous raid boss from WoW whom i'm attempting to emulate on my map. His encounter includes "dancing" around the staging area to avoid poison eruptions. This is the part of mine that is not working. I have written a few triggers to make it work but so far none do. No fog effect appears that i want, nothing. Can some experienced editor people look over these for me and try figuring out why they aren't working?

First, combat initialisation:


Code:

Combat Begins TPQ2
    Events
        Unit - A unit Is attacked
    Conditions
        (Unit-type of (Attacked unit)) Equal to Heigan the Unclean
    Actions
        Game - Display to (All players) the text: Combat initiated wi...
        Trigger - Turn on Combat Ends TPQ2 lose <gen>
        Set HeroDies = 0
        Trigger - Turn on Plague Mist wave 1 <gen>
        Countdown Timer - Start MistTimer as a Repeating timer that will expire in 30.00 seconds
        Countdown Timer - Create a timer window for MistTimer with title Plague Mist Phase
        Set PlagueWindow = (Last created timer window)
        Trigger - Turn off (This trigger)

First plague wave:


Code:

Plague Mist wave 1
    Events
        Time - MistTimer expires
    Conditions
    Actions
        Trigger - Turn off wave 3 damage <gen>
        Environment - Remove PlagueMist[1]
        Environment - Remove PlagueMist[2]
        Wait 0.01 seconds
        Environment - Create at Plague Mist 1 <gen> the weather effect Dungeon Green Fog (Heavy)
        Set PlagueMist[1] = (Last created weather effect)
        Wait 0.01 seconds
        Environment - Create at Plague Mist 3 <gen> the weather effect Dungeon Green Fog (Heavy)
        Set PlagueMist[2] = (Last created weather effect)
        Wait 3.00 seconds
        Trigger - Turn on wave 1 damage <gen>
        Trigger - Turn on Plague Mist wave 2 <gen>
        Trigger - Turn off (This trigger)

Damage caused by plague waves:


Code:

wave 1 damage
    Events
        Time - Every 1.00 seconds of game time
    Conditions
    Actions
        Unit Group - Pick every unit in (Units in Plague Mist 1 <gen> owned by Player 1 (Red)) and do (Unit - Cause No unit to damage (Picked unit), dealing 1000.00 damage of attack type Chaos and damage type Poison)
        Unit Group - Pick every unit in (Units in Plague Mist 3 <gen> owned by Player 1 (Red)) and do (Unit - Cause No unit to damage (Picked unit), dealing 1000.00 damage of attack type Chaos and damage type Poison)

Initialisation trigger works, timer window appears, when it expires though, nothing happens like it should.

|||After you create the weather effect, you have to call another function to turn it on.
Code:

Environment - Turn (last created weather effect) On

|||I see. But the damage didn't work either and that is not linked to the weather creation, it is a trigger on its own.

I redesigned the encounter to a similar but better sequence anyway, but it would be useful to know why the entire thing just didn't work.