TFS 1.X+ Correct cooldown for 8.6 spells

[ralke]

Guys! I have a little question here. I use TFS 1.X downgraded to 8.6. So I see many forks that are using latest cooldowns applied to their spells, which is incorrect, because this cooldowns have been enabled from 8.7 to higher versions. For example, exori gran displays as 6000 cd (6 seconds) forgottenserver-downgrade/data/spells/spells.xml at main · MillhioreBT/forgottenserver-downgrade (https://github.com/MillhioreBT/forgottenserver-downgrade/blob/main/data/spells/spells.xml#L42) which is correct if we're talking about tibia 8.7, but not with 8.6.

I have this two links right here:

Exhaust

Players get exhausted if they try to cast spells, runes or use potions in succession. In the case of spells and runes you will see a smoke puff on your character when you're exhausted. These are the forms of exhaust: Offensive spells and runes cause exhaustion for 2 seconds when casting other...

tibia.fandom.com

Cooldown

Cooldowns are an extension of the Exhaust system governing spell incantation. They were implemented in Update 8.7 and are part of CipSoft's ongoing efforts to balance Vocations. Almost all spells have individual cooldowns, the only exception being the party debuffs. Individual cooldowns varies...

tibia.fandom.com

So as you see, cooldown is displayed as a "new feature" which integrates the individual cooldown and the group cooldown.
So in 8.6 case, would you agree to have spells such as exevo gran mas frigo, or exevo gran mas vis, with 2 second cooldown?
I read you guys, thanks in advance!

Edit:
Added some requests to chatGPT

Spoiler: GPT answers