EDIT: With the re-buffing of Lamentation to 150%, the OP, below, no longer holds true. Rend damage will again be large enough that it is best to ignore WW and simply try to maximize damage from Rend. This means dropping Skull Grasp, and running with Zodiac, CoE, and either BoM + Mantle or RoRG + CC.
So, now we know: Lamentation got nerfed.
And in the wake of that nerf, I got to thinking about the damage that could be dealt by Rend and WW. With a 200% buff on Lamentation, it seemed pretty clear that the most optimal setup was to load all your damage into Rend, abandoning Skull Grasp, a good deal of attack speed, and possibly area damage as well.
Now, however, with that bonus reduced to 0%, it seems to me that the new most optimal setup might be one that maximizes both WW and Rend damage.
In the Barb Buff Proposal, I roughly calculated out that, assuming some stacked attack speed, WW, in density, deals about 265 times the damage of Rend (not taking into account area damage). Even with Rend added to Wastes (6), WW still does more damage (22m dps for WW vs 8.4 m dps for Rend).
Later on I tried to calculate out how much of your WW damage might be coming from your direct hits, and how much from your Area Damage. (You can see that post here).
If we’re trying to get damage from both Rend and WW, it will be better to use Into the Fray rather than Bloodshed (since Rend can’t crit), and in this case, about 89% of your WW damage is coming from AD (this is assuming you have stacked Wroboss levels of AD, 178%). Taking this AD into account, and fighting in good density, you should deal about 9.19 times that “base” 22m amount via WW, so roughly 202m.
Rend, in comparison, was left dealing 8.4m, after the Wastes (6) bonus. Ambo’s makes the damage that would otherwise occur over 15 seconds, take place over 1 second instead, so this is a 15x multiplier (8.4m * 15 = 126m). Assuming you’re still using Lamentation, Rend can stack twice (126m * 2 = 252m). Ambo-Rend doesn’t proc AD, so that’s where the numbers stay:
In density, 202m for WW and 252m for Rend.
Against a single target, it would be more like 11m for WW , and 252m for Rend.
Considering the sizable amount of damage that WW can add in density, it might be advisable to keep Skull Grasp, run CoE and Mantle of Channeling in the cube, and wear Lamentation. This ought to produce good damage for both WW and Rend, whereas if you take the RoRG + CC setup, you are forced to equip Lamentation in the cube, and to choose between Skull Grasp and CoE.
For weapons, I think IB is probably going to be the best for high pushes, with the BK weapons being also good, and considerably easier to use. There might also be a case to be made, though, for doing something crazy like running Ambo’s in your main hand, Echoing Fury in your off hand, and Furnace in the cube. While killing mobs in density, this setup would give more attack speed than either IB or BK, plus considerable extra damage to elites.
Anyway, I’m not 100% on any of this, but I’m planning on doing some testing once the patch hits.
Thoughts? Comments?