Over the bank holiday weekend I levelled up 3 x Monk and 1 Warrior to Inferno, Paragon level 2 - from creation - pretty much a difficult each day, I still did things like went to the Zoo so wasn't solidly playing.

I had 25% increased experience gems in my helms so that helped.

I guess as you've started now, you're able to answer your own questions

I play 4 x client at max settings and I get slowdown in the sewers, and occasionally when this new melee team have hundreds of spells firing off on a busy screen! Never was like that with the witch doctors.

I've now ticked the 'low particle' box I think it's helped.