Aust visitor after coaster fans ideas re Ohio

ok guys this is my itin, for my trip what do you think of it.
i have also incuded a list of the parks i have been in previously years,for comparisons sake.
magic mountain & cedar point are definitely 4 days each .Universal really bored me the second time i went, so the mummy has to sell me for that 1.

Orlando 4 days - IOA,WDW(MK),BGT USO?
Miami 3 days
LA 9 days - SFMM(4),KBF,DCA USH?
Ohio 8 days - CP(4),GL,PKI,KW
Then Vegas inc Primm.

PREVIOUS PARKS VISITED IN USA
DL,USH,SFMM,CP(3),WDW(5) 1998
PGA,SFga(NJ),PKD,BGW,VEGAS(inc primm) 1999
SFMM(3),USH,SFga(NJ),VEGAS 2002

Its your trip but I think four days is WAY TOO MUCH time devoted to SFMM. I wouldn't devote more than three days, and I feel you can do everything and repeat favorites in two days. But since you did three days last trip I'll suggest this:

SFMM [3], KBF [1], DL/DCA [2], USH [1]...that leaves you two free days. What could you do in those free days?

You could drive down to San Diego and hit the coasters at Legoland, Sea World, and Belmont Park.

You could do some of the small parks in the Los Angeles area like Adventure City, Pacific Ocean Park, Castle Park, Scandia, and Pharoh's Kingdom.

If you insist on planning four days at SFMM I'd suggest allowing yourself to change your trip plans on-the-whim because I predict after the third day you'll want to move on.

Have fun!

mOOSH

Of course, as long as you have fun, that's the most important thing. But if you can, give serious thought to shaving off one day at CP, and making the drive from Cincinnati to Holiday World. It's roughly three hours each way, but you'll be glad you did.
Your looking for uniqueness? Heck, that whole park is unique! I second the notion that you must visit the two incredible woodies there and the awesome waterpark. Great theming/ awesome atmosphere! You won't be disappointed:)