IK hit 64 grift, IKWW hit 63 but I'm working on a strait WW barb that just hit 67, still working on cube items and skills for final build but it appears now the whirlwind barb will rule. The new "bracers of the first men" are a must for the build, it helps get attack speed up from 1.67 per second to over 3 with a good roll. My first roll was not so good so I added gogok to a ring till I got a good one. With this build attack speed is the key. I am also using Bul-Kathos's set for weapons.
At the moment I have Furnace, hexing pants and the unity ring active in the cube. I am still working on the build before I post the final best in build barb but if your playing PTR give it a try its smoking hot.
PS.
Just found a post on Utube that is close to what I'm doing from Jhow, I will be trying his set up today to see if it beats mine. for those looking for more detail then I listed its good.
https://www.youtube.com/watch?v=ONYKCn--5T0