How do people afford Smite of divine judgement?

I see on poe ninja so many people with 1 mirror shield 1 mirror ring 1 mirror body armour.

That alone is 3 mirrors and then u have the neck for 0.7 mirror and not to mention all the gems needed.

Its like 10 mirror min to play Smite this league...

Can someone please help me understand?


Edit: Btw I started this build and now I cant do anything, feel like this league is wasted for me. I dont have currency to advance.