I think it works great in density, but I remember some folks having an issue with keeping their Fury up vs single targets.
A few other things to keep in mind:
Ambo can’t really roll ideal stats, since it always has STR and Bleed. Best you can do would be STR + 2/3 from AD, CDR, DMG%.
Swapping Brawler for WM costs you about 8% damage, assuming you’ve otherwise got max dibs in all the usual places.
Since you also spin slower due to Ambo’s being a MW rather than a sword, and don’t have the +30% AS from IB, it might be a bit tough to keep up Wrath without Boon. Not sure about this one.
I know I’ve mentioned this before, but the benefit of Furnace is somewhat reduced by the way AD works.
So, all that said, let’s look at the damage numbers…
In the other thread we figured F&R + MoC ended up with a 2.81x multiplier (when comparing to Crimson + CoE). Since we’re also factoring in IB vs Ambo/Doom, we need to add in another 1.3x, for the IB damage bonus, and a 1.08x for Brawler. That brings us to 3.94x for F&R + MoC.
The Ambo/Doom setup would be 1.56 (Crimson… I am assuming AD + DMG% on Ambo, rather than CDR…) * 1.5 (CoE) * 1.143 (Doombringer) = 2.67. You also pick up a little bit of damage from the STR on Ambo and the fact that as a MW it has a slightly higher base weapon damage than a sword… Let’s just call it 2.85x or something like that.
We also have to assess the contributions of BR:ITF,which is a bit complicated. In really high density, ITF can add 30+% extra damage, though usually you will probably see more like 15%. So that’s somewhere between 3.28x and 3.70x, which is still not as good as the 3.94x for F&R + MoC.
Finally, there’s Furnace. In density, this is really only going to make a big difference when you have a lot of elites mixed in with trash. It’ll certainly help against the RG, though not as much as you might hope, since Stricken somewhat diminishes the value (with Furnace, you will kill the RG in something like 21% less time). But, you’ll also stack Stricken slower, compared to IB, so, comparatively speaking, you lose even more of this value.
Looking at this, I guess I would not recommend this setup, unless, say, you had a terrible IB set, but a primal Ambo/Doom. There might be some rare instances when it would match the F&R + MoC setup, but I would be surprised if it ever exceeded it, and I do think it will be a bit more finicky to play.