The person who made the script said that it only need to edit two methods from Scene_Battle to be compatible with RTAB
Here how it works.
ex. Fire = 0 cooldown turns
Greater Fire = 2 cooldown turns (it can only be use again after 2 turns)
Mass Fire = 5 cooldown turns (it can only be use again after 5 turns)
so it means, after using the skill (Greater Fire and Mass Fire), it is unable to use after the cooldown is over, while Fire is able to use anytime
i know that it can be made by eventing using Conditional Turns in troops and Common events by skills, but it also not compatible with RTAB because in RTAB, the highter your agility, the often you attack.
I hope someone can help
BTW, thank you very much WhiteRose for fast response