I’ve actually been quite a few times. If it’s your first time, I recommend a full day. It’s one of the top tier Six Flags parks. I’ve never been on a completely dead day and usually have a waited at minimum 10-15 for the most popular rides.
They have a ton of credits if that’s what you’re trying to get and an amazing animal safari. You’ll be rushing around trying the get everything done.
If you *really* want to do just 6 coasters, I’d recommend Nitro, El Toro, Kingda Ka, Bizzaro, Superman and maybe Batman? Definitely do Wonder Woman, Battle For Metropolis, and Cyborg if you haven’t done anything like that. Safari is a must as well if you’re into that type of stuff. It really is a massive place that I wouldn’t nit pick at. Vastly different park from Six Flags America.
If you decide you want to do more rides and are concerned about waits, PM me atleast a day in advance and I can take care of that for you.