I can't confirm anything, but my Cluster bombs skill was doing 1 200 000 - 1 600 000 crits, after I got my bracers with 15% Fire skills damage increase I get 1 500 000 - 1 850 000 crits, so it seems to multiply your total damage rather than just add 10% to your skill. But, again, I can't confirm this.
I'm gonna have to agree with people here and say that there's no direct comparison here. Mostly because of much lower monster density and new elite affixes. So my 350k DPS DH was able to farm MP10 pretty well and I tried Torment IV, the regular monsters felt like MP8 to me despite larger HP pools. And it isn't just the lower pack sizes, it is also theit damage output. I was able to tank the packs without using Shadow Power half the time.
Now the elite packs are a totally different story. Especially if you go all the way and try Torment VI. I was able to beat some packs that didn't have too many elemental affixes, but any combination of Jailer, Arcane Enchanted, Vortex, Frozen, Waller and especially Thunderstorm were almost impossible to beat without dying 8-12 times. I actually had to start using Smoke Screen to be able to beat a Thunderstorm elite pack.
So with all that in mind (regular monsters are easier and elites are harder than before 2.0 patch) these are mine thoughs on the new difficulties:
Expert felt like MP0; Torment 1 is a lot like MP2; Torment 2 is like MP4-5; Torment 3 is like MP6-7, some elites were MP9 level difficult; Torment 4 is like MP8 some elites feel like MP10 or even 11 (if there was MP11); Torment 6 is like MP10 but most of the elites are waaaay stronger, so lets say MP12. I didn't try Torment V.
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Now the elite packs are a totally different story. Especially if you go all the way and try Torment VI. I was able to beat some packs that didn't have too many elemental affixes, but any combination of Jailer, Arcane Enchanted, Vortex, Frozen, Waller and especially Thunderstorm were almost impossible to beat without dying 8-12 times. I actually had to start using Smoke Screen to be able to beat a Thunderstorm elite pack.
So with all that in mind (regular monsters are easier and elites are harder than before 2.0 patch) these are mine thoughs on the new difficulties:
Expert felt like MP0; Torment 1 is a lot like MP2; Torment 2 is like MP4-5; Torment 3 is like MP6-7, some elites were MP9 level difficult; Torment 4 is like MP8 some elites feel like MP10 or even 11 (if there was MP11); Torment 6 is like MP10 but most of the elites are waaaay stronger, so lets say MP12. I didn't try Torment V.