Hello, I've found out a way to skip global cooldown, it got some positive parts and some negative, This might have been posted before or you alread know this but I'll refresh your memory.
First of all download Cheat engine 5.3 at Cheat Engine
1. Start world of warcraft, log into your char.
2. start cheat Engine 5.3 and press the little computer with a magnifier on it.
3. Press 'window list'
4. Select World of Warcraft ( there is some numbers and letters befire world of warcraft)
5. now click 'OK'
6. click 'Enable Speedhack'
7. Normal speed is either 5, 1.5. ( For me)
8. now if you write 100 under 'speed' your global cooldown will dissapear.
WARNING: Your whole game will speed up, you will see mobs move fast and yourself will move REALLY fast but its only you moving fast. so if you do this you will have speedhack AND no global cooldown so use this at your own risk at public servers, I only use this on private. this is good for mage AOE Grinding. On some private servers when you use Wowemuhacker for example it will say speedhakcer detected you will be rooted for 5 sec and admin will look at this later or something, but will cheat engine speedhack you wont get this. So no global cooldown, speedhack Undetected ( Only players can bann you by sending in a ticket etc. The server cant see that you are speedhacking. )
Hope this help you!