If you find a comand for a seperate cooldown- lemme know plz =)

So far it is one of the bigest problems. At least in story scripting you can reset only all cooldowns, and no way to modify a single one.

But alot of ppl still use the trick with skill removing/adding, and seems like it is the only way to modify skill data with a status atm.

But if we are talking not about cooldowns, then there are other ways to "trick" some of the propertys.
Like applying some buff at the start of skill cast (+damage buff or accuracy change or smth) and removing when cast is finished. Scripting again.

Or you can go deeper and make a "trigger skill" with no animation that will apply some status on self/enemy.
And then, using scripting
-check conditions (some status is active on you for example)
- if yes , then cast a skill #1
-if no cast skill #2
or smth like that