1. Buffing KC's durability to C. Why? The original SP:SO from the manga has E durability but in ABD, it's C. Buffing KC's durability is a good thing, the Stand is highly underrated. Even in the anime, KC was comparable to SP in raw power.
2. Using The World's Y in time stop will make you do DIO's combo on Kakyoin. You have to come close to the victim in Time Stop, just press Y, and it's done. It should deal a huge damage, though. And at the end of time stop, the victim will be flung and be ragdolled for 3 seconds. (The World is also a heavily underrated Stand, it's the main enemy of Star Platinum).
3. Star Platinum: The World "Final Time Stop".
Activates by holding F, not just clicking it. It's longer than the regular one by 4 seconds.
Wheb your health is below 40% percent, hold F, successfully perform the Time Stop, and after than you just have to click to perform Kira's beatdown from the anime (Barrage, and a final strong punch). Also deals a great damage, and at the end of Time Stop, the victim is getting flung and gets ragdolled for 3 seconds.
I'm sorry if I'm repeating things, I'm kind of sleepy right now.