I had seen several Arcane Barbs in PTR with a little bit above 2500-3100 damage. This range is only achievable by 10% damage and close to perfect min-max and base damage range. Dex number is so big in ancients, that you can not pass/re-roll this one. The fourth afflix is personal. RCR seems most beneficial (and uprated), especially with CA included builds, but if you can pull decent enough amount of RCR without the weapon, you might even consider elite dmg, CDR, vit, w/e. AS seems like a wasted stat on heavy weapons.
Highest theoretical Ancient Arcane Barb?