Hello.
When using this set I have paid attention to shortage of sustain. The description says:
(5 items) When you deal Critical Damage, you have a 10% chance to increase your Weapon Damage by 449 for 10 seconds. While this effect is active, your Critical Strikes heal you for 609 Health. This effect can occur once every 15 seconds.
I have carried out several tests by using Flurry with ~80% crit chance and being not with a full hp. There are some of my results:
I have allocated only key elements. 9 procs are too little for 44 critical strikes while the set was activated instantly. Also healing has worked 9 times - exactly so much how many finds room in 10 seconds at the cooldown in a second.
Obviously it works incorrectly so I expect to see fix of this set in the next patch.
Everything is viable