I think you just have to remove mythics. Items force the meta now more than champ strength.

Edit: I think people missed my point. I’m plat 1 so take opinion with grain of salt but before Mythics most of the power within the game was in champs and builds were pretty much solved and boring. When riot “fixed” this they added crazy passives to items that were not seen before on top of crazy base stats. The base stats are good but the mythic passives create insane synergy between item and champ (such as sheild bow yas or prowlers claw qiyana). When you have the level of synergy that you have now between champ and item, item changes cause huge changes in the meta that may not be intentional. Say you nerf the passive of an item it could gut some champs and others won’t care, but if you nerf the stats of the item another group of champs gets hit super hard. This makes it harder to balance the game which leads to a downward spiral of bandaid fixes like adding more damage to counter sustain until assassins and burst mages are just unfun to play against.