i keep dying in act 3 cruel

Very low resist and health is your main problem. Chaos damage is pretty bad. Damage spikes from Chaos damage is unmanageable. Chaos damage spike is one of the main reason why melee build is unworkable in this game. A quick fix is using high level decoy totem. Decoy totem will take a lot of pressure off you. Low level totem will be useless tho because it won't last one hit. However they will be able to take the alpha strike form a large mob.

Just because he is dying doesn't mean that his build choice is bad or that he should reroll. Farm City of Sarn or Docks for gear upgrades until you get yourself to a point where you feel more comfortable with your survivability. Maybe use some respecs to shuffle points into health or resistance nodes that you can take out later if you are going CI.