just open your aika and cheat engine after taht load the files and you can see a lots of address just click all the address and change the value to 1000 and now your skill will become 1 sec cooldown sorry for my bad english and dont know ho to lessen the address xD
Credit to Sir Yizheng he give me a hint on how to find address for skill
Credit to Sir Dwar for his bypass tool
NOTE: THIS SIMPLE CHEAT IS APPLICABLE ONLY IN AIKA GB