Seems like the frenzy barb is now viable in 2.3 using the depth digger pants (100%), rorg (used for undisputed champion slot) and the furnace (50% dmg to elites) as kanai passives.
Wearing IK gloves, helm, armor, pants, boots + the undisputed champion to unlock all frenzy runes. Also use focus/restraint. (100%)
Cold build using ice blink, azurewrath, utars, + simplicity strength and taeguk
I've not tried this out yet, what are your thoughts?