What should I upgrade first for my CF Champ?

Corrupting Fever

3.20 Corrupting Fever Hidden Blade Champion

Corrupting Fever

[Path Of Exile] POE 3.20 - CF/KB Champion MF juiced map run

Reap

Ruetoo's CF Champion - Top Tier League Start Mapper

Corrupting Fever

CORRUPTING FEVER CHAMPION - T16 SHOWCASE [PATH OF EXILE 3.19]

Corrupting Fever

[3.19 Endless Delve] Sunder Champion | Path of Exile

Sunder

Ultimate KB corrupting fever champion - need more input

Reap

Beginning to Min Max CF KB champ looking for feedback

Corrupting Fever

Next steps for upgrading CF Champ

Corrupting Fever

[PATH OF EXILE | 3.19] – UPDATE – BLEED BOW GLADIATOR – A RELIC FROM THE PAST!

Puncture

Exsanguinate Champion

Exsanguinate

My Selfcast Exsanguinate/Reap Build

Path of Exile 3.18 Corrupting Fever Gladiator Build Showcase

Grimro's Ultimate Guide to Corrupting Fever | 3.18 League Starter

LS Champion - The Feared Deathless

(3.17 Siege Of The Atlas} Armour/Aura Stacking Lightning Strike Champion VS The Formed(38%IncHP)

Looking for advice on how to continue with Poet's pen CF Reap/Exsan build

[Zizaran] Ruetoo's Corrupting Fever Champion league starter - 3.17

Champion self-cast Low Life Impale BFBB vs Wave 30 Simulacrum

Noteworthy Interactions | Episode #14 - Impale Spells (Again!) ft. Eternal Youth