http://http://eu.battle.net/d3/en/profile/Jaff-2301/hero/4264751
ANyone would be able to advise me what should i upgrade first to be able to go through act 3?
I have 3kk.
I'd say you need more vitality, armor and all resistance. Neck and belt are the obvious choices to upgrade first. After that I'd look for some legs with all res.