I got a

950% GF/786% MF Barb with a nice Guillaume's/Treachery/ Eth Reaper's Toll merc build.

Just do a budget build:

1x ik helm double isted
1x enigma
2x alibaba double isted.... or 1x ali baba and 1x beast to see your A2 merc reach that halarious last IAS bp
2x 10 FCR/life/mana/res/ MF rings
1x 3 wc/35% MF Amulet
1x war traveler
1x gold wrap
1x chancies
gheeds, anni, btorch, 4x 7% mf/res SCS

Switch:
Hoto + x/3+/x CTA

Don't use dual CTA or face the wrath of the -skill bug.

/E: Here's a secret. There's about 3-6 Superchest in Lower Kurast that you can pop HR's out of more frequently than any other places in D2.
Run your bots, do 7 bots who run chaos and baal, and have your 8th bot (barb) loot everything. winnnnnnnnnn