How are we 100% on Both Attack Speed Caps?

Seriously. I don't understand how anyone hits 100% in Cap 1 AND Cap 2, I've watched videos on YouTube and tried following guides and it seems that most people only Temper enough Cutthroat Attack Speed to maybe be around 40% depending on the Rolls they get and other bonus'

This is for a Dance of Knives Build as I know Attack Speed is Raw Damage. And I'm trying to get it to be able to clear Pit 100 Solo as my end goal with all my characters