You're buffing Illaoi's E cooldown to encourage Conqueror.

It didn't even cross your mind that this will just force every Illaoi ever, one of the most oppressive top lane champions in league of legends history, to run kleptomancy every single game because now they can proc it even more often off spirits? You didn't even CONSIDER this?

Buffing conqueror Illaoi? Are you serious? By reducing the early game cooldown of her E? That ability that typically instantly wins top lane at level 4 because NO CHAMPIONS IN THE GAME can go up against her without losing 80% of their health? And you REDUCE its cooldown early game?

Her ONLY counterplay is to hope to god the Illaoi player misses her E, either by hitting a minion or by throwing it so far away the enormous hitbox slips past you. So you're gonna let her cast it EVEN more often? Give her opponent EVEN LESS chance to interact in the lane, because they're too busy dodging 200 damage Qs and a death sentence with a Morgana hitbox to even farm?

I'm just pointing it out right now. You've made this mistake before with other champions - with this change, you are FORCING all Illaoi players to run kleptomancy for maximum efficiency. They'll be missing out on way too many gold bags and consumables if they run anything else.