What should I upgrade first for my CF Champ?

DPS: 1.25M
Effective HP: 124.2K
Life: 4.95K
Level: 93
Min budget

Overview

What should I upgrade first for my CF Champ? is a Path of Exile Champion build by I_Am-Awesome, made for the Crucible league (3.21). It is centered on Corrupting Fever and plays as a strength, spell, duration, physical archetype. In Path of Building it reaches 1.25M DPS with 124.2K effective HP, 4.95K life, 116 energy shield. Suited for: Expedition. Key uniques include Haemophilia, The Poet's Pen, Doryani's Invitation, Saffell's Frame.

I_Am-Awesome's Notes

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Hey exiles, I haven't played the last few leagues and decided to give CF a go in this one since I hadn't played it before. Build is pretty standard, Divine flesh, 50k armor with 10% of armor applies to chaos mastery, 80/79/79/84 resist, poet's pen with reap-exsanguinate-brutality, fever + vaal reap 5 link. It's pretty good, great clear but meh single target as expected. One issue I had up until recently was bad recovery, even though I was able to tank multiple hits from bosses my leech wasn't good enough so I got a vitality + arrogance setup and specced into surge of vigor(every 4 seconds regenerate 15% of life over 1 second) so we're much better in that department now. In fact I might drop vitality + arrogance for something else since surge of vigor performs much better than I expected.

I'm not really sure what would be the most efficient upgrade would be in terms of currency. Maybe get a rare wand with offensive mods but reap + exsanguinate from PP deals more dot dps than CF right now, so I'm not sure a rare can provide enough damage unless I get a gg wand. Also losing hits from the reap/exsanguinate would butcher my already lacking leech.

However, that would also open up 3 slots we can use for different shenanigans, maybe get an enlighten to squeeze a Herald of Purity, and get better jewellery to use Circle of Guilt?

One obvious looking upgrade would be the chest, I see a lot of people use Dialla's but that would also require getting some dex and chaos res from elsewhere as well as costing some life. Also If I were to go for the chest upgrade I'd rather get a Skin of the Lords since it'll also give a lot of armor, but one with correct colors and non-brick keystones are quite expensive right now.

Anyway I rambled more than enough, most of you are better at building then me so here's my pob: https://pobb.in/o6EE8GPOz6JT

Thanks in advance!

Edit: my goal would be chaining tier16s with atlas tree set up for expedition, also maybe push for level 100(prolly go for chayula rotas for last level if that's still the way to go), so goal is to be faster without sacrificing tankyness.