Help in improving build

I'd like to keep my unique items. Please help me improve my build.
Help me realize my potential from items. Please leave your comments.

https://mobalytics.gg/poe-2/profile/40605a65-ef32-42b8-a851-dcc4f334483e/builds/fee4ae05-59ed-4332-b8e1-21d605ef9cc5

What is it supposed to do?

How is it suppose to work?

Whats your attack skill?

Why do you use chaos spear for rainbow build?

How do you plan to survive without defences/hp/es?

What do you expect from us when we are not allowed to change randomly chosen uniques?

What is it supposed to do?
Boss Killer Build

How is it suppose to work?
Easy... 1, 2 or 3 button is enough

Whats your attack skill?
Spear skills

Why do you use chaos spear for rainbow build?
I like Spear, uniques

How do you plan to survive without defences/hp/es?
Armour? Resistances?

What do you expect from us when we are not allowed to change randomly chosen uniques?
Set skills, gems and tree? Modification items?