Ya, i need the same advice as well for my season barb alt that I just leveled yesterday. I tried WW and Raekor6 (without vileward) for 55, stuffs are not dying at all.
On the other hand, I had a non season barb with fully optimized stats ancient, partially augmented, I was able to clear 71+ for both R4IK6 and leapquake, but I have trouble on season just to clear 55 with zero ancient item but with the level 70 gems from my DH. I have a feeling that leapquake might clear 55 easy without ancient items but my set is not complete.
I tried something like this http://www.diablofans.com/builds/73637-ww-poc-build-with-blade-of-tribe with all non ancients, seems like the damage is not there as well.