Try and use as an event the following:
"A unit Starts the effect of an ability"
And also move your second and third "If (All Conditions are True)..." in the "Action" section, not the "Else" sections.
May as well replace the waits with a different trigger, that fires when the ability is cast and...
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You're adding an ability and in the same time removing that ability. You can just add the abilities you want on the alternate unit your Chemical Rage converts to.
Example:
Your normal unit has ability A and B.
Your Chemical Rage unit has ability C and D.
You can try and alter Spirit Link (Orc - Spirit Walker) in the following way:
Tweak Spirit Link's stats (see below) to your needs, afterwards make two triggers - first one, that will cast the altered Spirit Link on your unit each time it casts its "shapeshift"; second one, that will remove the...
Press Ctrl+D
That should show you the raw value of your "Brilliance Aura" ability.
Example: A000:Ahab
A000 is the raw value of your custom Brilliance Aura ability. You should fill that in the descritpion, such as:
<A000:AHaB,Data1,.>
You have to be kidding me.
-> "heals the targeted units by triggers" - are you serious?
The base ability is Defend, and we all know (except you, I guess), that Defend lowers the damage by a percentage. Sheesh, healing through triggers, right... try detecting that sort of stuff for each...