Not using SLI, runs smooth here. Nothing too crazy I don't think.

I think Wizards or Crusaders are the easiest to do higher torments with, although you run into kill speed issues with certain types of setups.

I re-made my WD build a bit after the advice given here and Grave Injustice is a pretty staple ability - especially on lower torments. Possibly with damage scaling it may improve but hot dog Jaunt is always up, and I spam the Gargs whenever they are up, so it still feels like they are active most of the time but now they do crazy damage.
Could not drop the Fetish Army though, using rain of toads - it just doesn't spawn enough little guys compared to the 8 you can summon on command - one of my characters uses a carnevil and all those poison darts turn into some pretty fast damage.
I ticked it up to Torment 2 and my clear speed felt the same, with slightly more gear I am going to push it further. Hoping they roll out that patch soon to make the higher torments more worthwhile.