There is no guide for this, interested to see some takes on a bvc/bva Tele-Conc Barb setup

Usually zerk is used.
Conc has a feature where it remove necro bone shield even on a miss though Think it was conc

You can pretty much build a zerk one, and skill conc instead, there is no difference in gear.

There's no pvp zerk guide either

Depends if you want block or not.

There are some different version. But the best version of a zerk barb is a bvc, because people can walk exploit vs zerk, and make countermessures, and then you swap to wirl.

Breakpoints are key, here are for concentrate:
Berserker axe: 48ias = 11 fpa, 75ias = 10 fpa, 125 ias = 9 fpa
Berserker axe with beast offhand: 44ias = 9 fpa
Berserker axe with mark of the bear: 52ias = 9fpa
Phaseblade: 42ias = 9fpa

Builds:

Build 1:
Phaseblade + phoenix / stormshield
Arach
HL
Trang oul's
2barb/20ias/adds/2soc 'chamBer' (FRW IS REALLY GOOD ADD HERE)
10fcr/adds ring
wisp / raven / dwarf / carrions
Gores // 3resi // hots //
The issue here is that resists are not high.

Build 2:
Berserker axe + stormshield / phoenix
Rest of the gear the same, but cube cast with 3bo metamorphosis, use a beast offhand to enter bear shape.
(Mark of the bear gives 25EIAS and 20% DR. Which leaves you at 36% DR which is fine.

Build 3:
Berserker axe grief + beast grief
rest the same.

The build is way greater as berserk skill instead of conc skill.
The thing about berserk is that no1 has magic res or abs(exept like 8 in spirit)