This is a full suggestion for your whole character:
Your life is currently 44.5K which is fine, or maybe even too much, since I can do Act 3 with like 38K Life.
Try to swap your Helm with something similar, but you can do with 4% Crit, and pull in some Dexterity, or a Socket.
Swap your amulet for something that has Dexterity, Vitality, Decent Crit Chance, and All Resistance, and even some Life on Hit.
Shoulders are decent - But you can pull in some more Vitality and Dexterity, and try to get in some Dual Resistances.
Swap your armor for something that has at least 100+ Vitality/Dexterity apiece, with 1-3 sockets, and at least 55+ All Resistance. (Sockets aren't necessary, but allows the configuration of stats, slightly).
Swap your gloves for something that has around 150+ Dexterity, 80+ Vitality, ~50+ All Resistance/Cold or both, and 6+ Critical Hit Chance.
Swap your belt for more Dexterity, Vitality, and some Dual Resists, and if you can - Life % which is very useful.
Swap your bracers for something with similar Dexterity and Vitality, but try to add in at least 3% Critical Hit Chance.
Swap your first ring with nice Vitality and Dexterity, and stack Cold or All Resistance, it won't help if you stack both Physical and Cold.
Swap your pants with something that has 100+ Dexterity, 80+ Vitality, and 2 sockets, and again, Cold/All Resistance or both, and try to get some Armor.
Swap your second ring with All Resistance, Dexterity, Vitality, and some Critical Hit Chance.
Swap your Mainhand for something that has 850+ DPS, and around 650+ LoH and some Base Crit (60+, a socket isn't necessary unless you have base stats).
Swap your boots for something that has a bit less Dexterity or similar, but a bit higher Vitality and more Resistances.
Swap your Offhand for something that has 750+ DPS, high LoH, and decent Crit.
If you're having trouble surviving, I suggest you swap Fists of Thunder to Deadly Reach with the rune that gives you more armor for a short period of time.
Swap rune from Breath of Heaven to the rune that increases your damage for a short period of time
I'd suggest you use an Manta of Evasion with a rune that gives you more Armor or Mantra of Healing - Time of Need which increases your Resistances.
Also swap your Passive for Resolve - Takes 25% Less Damage For 2.5 Seconds.