Diablo – limit to the number of cyclones that can be spawned from Sweeping Wind

He can be talking about the book that drops from Jondar, where he discover some information.

As they journey together the Hero begins to ask Kormac about his past prior to joining the Templars, of which Kormac has no memories. He explains that like many Templars he was once a criminal who was purged of his evil ways and made to serve the light, forgetting his past. The Hero continues to as ask Kormac if he ever wantes to learn of his past, and persuades him to look into it, using the information from a book that his traitorous comrade Jondar had in his possession.

As Kormac reads the book he grows worried that he could be being corrupted like Jondar was, and fall back to his old away. Kormac finds information on the Order that shocks him, and comes to a passage which undoes the spell that removed his memories when he reads it, allowing him to remember his past.

Source

I use Fists of Thunder for the gap closer and the 10% movespeed Passive as means to get more uptime for the Vortex - that gap closer and more mobility is the difference between the vortex falling off or not, a lot of the time.

Small chance, I guess, is because your base crit chance is low. I've noticed the skill stacking up on each crit I make - and using Crippling Wave as my 2nd autoattack, for example critting two enemies with a cleave will pump the aura to 3 instantly.

Continuous is based on your attack speed as is with many other "tick" based spells.

I also use the Dodge Mantra to not have to back out of a fight since you wan't to be there, letting the Vortex work it's magic for as long as you can. I also use Serenity (absorb all damage for 3 seconds) and Blinding Light as means to keep me out of harms way while steadily grinding down waves of foes with cleaving and the Vortex.