I just figured ss is needed in HC
Depends on playstyle, but, on SSF playthrough, Oath + Lawbringer makes it quite safe for a frenzy barb if you stack resists and life leech on other items.
Decrepify makes it safe and also helps mercenary survivability a lot.
I really like frenzy for survivability.
Just don't get surrounded. If it happens, reposition with leap.
On high end gear, you can also add life tap.
WW is flipping a coin as you can't use potion and you sometimes have a bad ending unless you have high end gear with max block and berzerk has no life leech.
To each their own, but this is my preference. 😉