I think for cs it's 150k, i could be wrong on that though
For wins i have no idea, i'm sitting at like 1.2k right now and i've been diamond on it for a while, so maybe around 750?
No idea on the exact number, but I have diamond in those 2 categories.
For wins, I have 824; would guess diamond is at 750. For Creep Score, I have 216901. I'd guess diamond is at 150000.
My guesses are just that, guesses, but since people tend to use the flat numbers I'd assume they are close to if not above the actual amount needs.
I have used http://lolsinsider.com/ to determine my creep score efficiency. It helps determine how well I creep compared to the pros. Ignore the badges in the game, lol.
600 Wins no idea about the other two