The best will be that every class will have same HP and DPS, but not like 100k/300k but like 2k/100...
I have WD quite good geared, on PTR after changing gems i had like 200k DPS/75k HP/600@ress - but it was boring, when I get to game with 3 barbs (then changed to 2baba/1dh) and I was like 300w/20l - rly...
And today - 90k HP, 600@ress and 120k monk is 1 shot me with his giant bell...
Now PvP isn't about skill, it's all about luck.
So for me, best would be like some1 sugested - white/blue items for everyone - there will be duelmaster who will carry these item sets for ppl and when their match start they take it and then give it back.
But next prob - PLvL... When 10PLvL duel with 100PLvL it's 270 main stat and 180 vit more for second one... So it means that everyone should make alt sticte for dueling (well, it will be hard for me, as I have 10x 60lvl, and one WD is my main and 2nd one is on HC...
).