There are at least 190 skills with their reuseDelay wrongly implemented on Vaguard and, a I've tested some, on Crusader too. Many of them have impacts on gameplay and balancing.
I've posted about how do I found this problem here
https://l2jmobius.org/forum/index.php?topic=9859And did the fixes needed on this fix:
https://pastebin.com/LSfMkr5kPS.: I'm posting here as it's a contribution and people may not find it on bug session.