User blog comment:Lykrast/Saki, the samourai/@comment-12443575-20140323203358

Rank 5 W hitting at least 3 champs with 40% CDR will have no cooldown and therefore you can mash it to instagib the first champ to die. Also, 10~30% free armor shred might be too much, something like 14~21% sounds more realistic (and not useless early game). Also, this might need a clarification: do toggle-off and toggle-on W's have separate cooldowns?