I mean people with 100k hp, life regen, 10k armor, block, tons of resist, and 150K dps who use rend? Oh and abour 3k+ life regen on top of it.
Most of them use ik set + unforgiving setup, so they have 100% marathon sprint uptime, and still gain some fury.
I found that people play duels with certain rules vs barb. If wd uses hex (which means perma stunned barb), barbs are allowed to use wotb (dodge rune, unkillable and unstoppable).
So either hex vs wotb, or hex and wotb banned.
Problems I find in this encounter is, that even with really good dps (300k+) they can tank it and regen no problem.. With ignore pain they heal through hardest critting haunt.
They can tank enormous amounts of damage, move faster than wd (permanently), their rend acts like haunt, so we are easily screwed by it, even if used spirit walk.
Basically such barb rushes at you, you can't escape cause he is faster, you can't burst kill it because they easily tank it. They leap, throw with stun, so zombie barrier doesn't help. Just catch you with rend, gg.