User blog comment:Slashingstrike/Kritalius Striker/@comment-5035765-20160831074131/@comment-3391671-20160902013621

This item does work as a "no need to build crit" item due to that active. Even if you extend the cooldown more (which should be at the very least 15 seconds), it would just allow any champion to land a guaranteed. It's not just 50% or 60%, but. "But crit damage and bonus damage are different." It's still to a basic attack.

The ignoring (no such term as "ignoration") will still be effective on any other champion since Fighters and at times Supports will build a decent amount of armor if your team has a lot of  champions. The opponent cannot easily counter this item since any armor they build will likely be ignored on hte first strike of a fight, giving way for Assassin to take advantage of allies who use this item.

And to repeat what Iffem has already claimed, you have only looked at potential items but not appropriate ways they should be given stats. There is a reason why I've asked if you are obsessed with (and as of now  mechanics).