Here is another spin-off mini mod:
StackAid Promotion Mod
StackAid Promotion Mod
It adds new Promotions: StackAids (idea/python code by Zuul, modified by GIR)
It also adds a little python code:
Some pics:

Have fun!
Thread:
http://forums.civfanatics.com/showthread.php?t=241245
It also adds a little python code:
The new Promotions come with a new system, the StackAid system (see pic for new Promotions). You can’t promote your units with this Promotions, but units will get this Promotions depending on the Stack they are in:
e.g. a stack of melee units will get the Heavy Aid Promotion. If a unit will get the HeavyAid_I, or HeavyAid_II or HeavyAid_III Promotion depends on the base strength of the unit and the total strength of the melee units in the whole stack. That means a bigger stack give your units higher StackAid Promotions and weaker units will get easier higher Aid Promotions like strong units.
Of course you can mix your units and they will get different StackAid Promotions: e.g if you have a stack with melee units, scouts and archery units your units will get HeavyAid, ScoutAid and RangeAid Promotions.
Note: Stacks that are too big lose the benefits from StackAid Promotions. For more info see spoiler.
I decided to only give weak effects to the Aid Promotions so it only has a small impact on the gameplay but you can change the Promotion effects in the Promotion.xml file.
e.g. a stack of melee units will get the Heavy Aid Promotion. If a unit will get the HeavyAid_I, or HeavyAid_II or HeavyAid_III Promotion depends on the base strength of the unit and the total strength of the melee units in the whole stack. That means a bigger stack give your units higher StackAid Promotions and weaker units will get easier higher Aid Promotions like strong units.
Of course you can mix your units and they will get different StackAid Promotions: e.g if you have a stack with melee units, scouts and archery units your units will get HeavyAid, ScoutAid and RangeAid Promotions.
Note: Stacks that are too big lose the benefits from StackAid Promotions. For more info see spoiler.
I decided to only give weak effects to the Aid Promotions so it only has a small impact on the gameplay but you can change the Promotion effects in the Promotion.xml file.
Spoiler :
Some pics:


Have fun!
Thread:
http://forums.civfanatics.com/showthread.php?t=241245
Link to all my mini mod components: