Glad it works, but if you're saying that you already had a Unit Indexer in your map then
DO NOT import the one I linked. You should only have
ONE unit indexer in your map at a time, because that's all you need.
Understand that a Unit Indexer is a very simple system. All it does is assign a unique Custom Value to each of your units, whether they are preplaced on the map or created later on.
Custom Value is an Action that you may have seen before. It lets you save an Integer to a Unit and can be used for many different things.
So let's say you only had 10 Footman in your map. The Unit Indexer system would give each one of those Footman a Custom Value between 1 and 10. No two Footman will EVER have the same Custom Value.
Now that we know each unit has it's own unique Integer (custom value), we can start to take advantage of that.
By using Variable Arrays we can save as much data as we want to our units. Here's an example:
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Events
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Time - Elapsed game time is 0.01 seconds
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Conditions
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Actions
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Unit - Create 1 Paladin...
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Set Variable FireDamage[Custom value of (Last created unit)] = 100
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Set Variable ColdDamage[Custom value of (Last created unit)] = 200
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Set Variable LightningDamage[Custom value of (Last created unit)] = 300
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Unit - Create 1 Archmage...
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Set Variable FireDamage[Custom value of (Last created unit)] = 25
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Set Variable ColdDamage[Custom value of (Last created unit)] = 50
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Set Variable LightningDamage[Custom value of (Last created unit)] = 75
In the above trigger I've created some Integer arrays (FireDamage, ColdDamage, LightningDamage) which are meant to track how much elemental damage my unit's deal. I've given the Paladin 100 Fire Damage, 200 Cold Damage, and 300 LightningDamage. I've given the Archmage 25 Fire Damage, 50 Cold Damage, and 75 Lightning Damage.
So using this method I was able to create new stats for my units. This is great for making RPGs since you may want more stats than just Strength, Agility, and Intelligence.
Now let's say my Archmage has a spell called Fireball which deals damage to an enemy unit. I could use his FireDamage stat to calculate the damage dealt:
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Events
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Unit - A unit Starts the effect of an ability
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Conditions
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(Ability being cast) Equal to Fireball
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Actions
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Unit - Cause (Casting unit) to deal FireDamage[Custom value of (Casting unit)] to (Target unit of ability being cast)...
This will deal 25 damage to the enemy unit since we gave our Archmage 25 FireDamage[]. If our Paladin were to cast Fireball he would deal 100 damage since that's how much FireDamage[] he has.
We've now created an Ability Power system which should be familiar if you've ever played League of Legends before.
And it doesn't stop there, you can use any type of Variable Array, it doesn't just have to be an Integer. This can be useful for keeping track of Special Effects that are attached to Units that you want to delete later on. It can be used with Booleans to remember different states about your unit -> Is my unit in town? Is my unit a boss? It can be used to save just about anything you want to a Unit.
OrmanRegen
Honestly i don't understand how it that works but it is working. It looks extremely confusing to me and i don't think my brain can handle this one but it works 
