This is how you will learn to have no cooldown on your skills.
When you delete a character on your server be sure there is a time until he is deleted.
1. Use your skill.
2. Exit to character selection.
3. Delete your character.
4. Restore your character.
5. Then your skill is ready to use again.
P.S. This skill is more useful for people who play olympiad.
So they dont have to wait for their skills to cooldown and can sign up again with all their skills ready to go.
Here is a video incase you don't understand the instructions.