>>718068435
100% cards is not bad at all since you are bound to get Random Joker at some point. Riku 99 and Sora 99 are worse than 10 Affinity or all * ranks solely due to the fact you can't turn your brain off when doing it. You constantly have to be spamming sleights until Dark Riku, picking Lexaeus, and then jump attacking until stuff warps so you can run around grabbing EXP drops. For Sora you have to constantly be Mega Flaring on Destiny Island which doesn't always work and requires you to be attentive to it. For both of them you have to constantly be platforming and making new maps then hunting the Heartless down.

With all * you just follow a guide and savescum until you get what you want and you're done.
With 10 affinity the only brain on moment is making the four Tyranto Rexes at C rank, getting enough EXP for the Mega Flares, and then it's brain off for the next 30ish hours.