Just so you know, my IK HotA Barb with ideal gear and 50 into Fury Paragon has a CHC of 97%(5% Base, 5% Paragon, 44% from Gear, 3% from Battle Rage, 10% from Wrath of the Berserker and 30% from HotA thanks to its inherent boost to CHC based on current Fury). Since the minimum amount of Fury after Paragon is 150, the HotA Weapon returns more Fury than it consumes and the fact I have Unforgiving Passive that removes Fury degeneration(and Ancients supplying Fury thanks to Ancients Fury rune), I essentially ensure 97% CHC all the time. You get +Max Fury on IK belt or on the Gavel(or both) and you theoretically can push it over 100%. That means all that Critical Hit Damage(430% with CHD on Gloves, a Ring and Amulet) is fully utilized. Furthermore, rune on Battle Rage that yields life on Critical hits always procs.
Throwi in permanent WotB and you got yourself a good version of a Hulk Smash build or as I like to call it, a Thor Ragnorok and Roll Build thanks to its Lightning Thunderstrike rune.