I keep dying often, problem with my build?

Hi

I'm curently following the Toxic Rain Champion build from POE Beginners website. I'm level 84 and currently running lvl10 maps. My dammage is okay enough but i feel really squishy. Some bosses and elites take almost all my HP with 1 or 2 hits. My res are well above 75, chaos res is at 55, almost 4k life. Can you please look at my build and suggest what i should do to have better defense?
Thanks

3.5k HP is nowhere near enough life at this stage.
You should be at 5k hp by now.

The reason why you cant get there is because most of your items have either zero or close to zero flat life rolls on them.

Try to get about 60hp+ on every single item (except your weapon) on average, if you can.
If you did that, you´d be very close to 5k hp right now.

None of your gear has life in it. You want to try and get around 100 life in each item when you can. I know you said your damage is fine, but you'll need a six link bow or armour for your main skill if you want to reach the late game content. Also, do you have a link of the build you are following? I only see one unique item, nothing really to compliment your build.

60 flat life between all your gear, whew I am surprised you made it to 84.
For perspective - My level 25 Shadow has 56 flat life on its gear.