Well i actually used that method, but it gave me a different skill that doesnt work. Basically I'm trying to modify the Simple mode of lightning SIN, i also found a thread that you have posted before . But i cant seem to find the correct skill ID
https://www.bnsbuddy.com/threads/request-lightning-assassin-simple-mode.728/
https://www.bnsbuddy.com/threads/request-lightning-assassin-simple-mode.728/
Follow this guide.