survivability and get a blue 800dps weapon (max 100k at ah)
Vit to an extent is good, but its kinda useless without armour/ resist..
I used to run vit build (just under 60k hp) which got me through hell np but its kinda useless in hell.. they just hit through hp like nothing.
I found that capping yourself at around 35-40k hp is more than enough, focus on armour and ONE resist, you need to get to 350 AT LEAST. plus focusing dex give you a lot more dps =P
As long as you dont stand in lava/poision/beams etc you'll be fine.. Act 1 inferno on monk isnt actually too bad, its challenging, but doable and fun.
Act 2 on the other hand is a total joke.. Make a new char after act 1 and wait until blizzard fixes damage mitigation.
Also.. where the heck are you getitng 800dps weapons for 100k lol