And don't know which way to improve your champion, I can show you one way:
Champion (items + stats): http://eu.battle.net/d3/en/profile/Anarkin-2779/hero/364213
Made a short video about how does it works:
Also, it seems that your resistances are around 775 and armor is around 5000...correct?
i guess it is possible to sacrifice armor to get high rolls of dextery + vitality + resistances.
i remember seeing Tempest Rush/Tailwind for the first time in your build for act 3...i'm almost at 50k dps (as you were at that time) and i thoroughly enjoy the skill so i can't wait to be able to use it in act 3 ;)