Originally Posted by
skasio
Skill activation debuff isn't all that great IMO, unless you stack it to full 70%.
Knights have max base skill activation of ~35%, so you can safely assume bosses have similar numbers, maybe going up to ~70-80% for broken/EX bosses due to buffs. 20% won't make that big of a difference, it gives same effects as just being lucky with better/worse RNG, since as far as I can tell, it's not a flat debuff. E.g. boss's 30% activation, with 20% debuff goes down to 24%. Barely noticeable in the long run.