-Whirlwind, with hurricane rune
-Frenzy with maniac or vanguard (if you want even more mobility)
-Warcry with Impunity
-Sprint with run like the wind
-Wrath of the Beserker with Thrive on Chaos
-Battlerage with into the fray
-Tough as nails/nerves (depends on your vitality)
Other options could be weapons master, ruthless, or superstition for people with low resist issues.
Gear: This is an extremely gear dependent build, and to reach the max freeze chance you must use very specific gear.
Weapon: Azurewrath, there is no substitute for the barb who wants to make ice sculptures out of ubers. 15% (Mine is 14.6%) max freeze chance and 21% max increased attack speed are great for this build. There is no life on hit, but you will get your life on hit from other gear and hopefully if you have over 20% freeze you wont be getting hit too often, as the nados from sprint proc freeze.
Shield: Any Rare/Legendary with 2.6% freeze chance or close to it. Stormshields can have chance to freeze, but I personally use a rare that gives more crit chance. Anything over 2% freeze chance is serviceable, mine currently has 2.5% chance to freeze.
Belt: Any Rare/Legendary with 5.1% chance to freeze or close to it. I currently use a solid rare, but I highly recommend immortal kings belt because it can roll good mods for ww and gives life leech, but a solid rare is plenty serviceable.
Pants: Blackthorne's Set pants or a good rare, though I recommend these pants because u will need as much life on hit as you can get and these are the only pants that give life on hit, mine give me 474 life on hit our of a possible 479.
Amulet: Star of Azkarnath with close to perfect freeze chance (p =5.1%). You can get away with not using this but it is the only ammy with freeze chance and I highly recommend it. They can roll with some good mods like crit damage or all resists.
Rings: This is really your call, I use rings with crit dmg, resists, attack speed, and other mods. I may use a hellfire ring down the road once I buy the damn plan XD, I already have plenty of organs, but havent bought the 2 million gold plan from squirt.
Helm: Any rare/legendary you want
Boots: Any rare/legendary with good mods and close to 12% increased walk/run speed.
Lastly some tips for playing with this build. While this build is easy to play there are some small things that can make you almost unstoppable.
Corral elites: When you run into elite packs hit battlerage, pop wrath and circle them with sprint. The nados will imprison them in ice the whole fight or most of it at least. When you learn to effectively circle them, elite packs literally can't fight back.
Always have battlerage on: It is easy not to notice certain things in the middle of a long fight. Keeping battlerage going has to be a priority for anyone using the build. It keeps your wrath going and it allows you to use whirlwind almost limitlessly.
I am not even close to being the best diablo player, but this build has been fun for me and very effective even at the higher monster power levels. Some of the gear is pricey like the ammy and weapon, but it is well worth it. If anyone has any improvements for this let me know, I am always trying to get better.