IMO, Zone Classic is soooooo much better than Prime Time (I own both).
ZC is prefect for medium oil, but it can be too strong for light oil for some people.
Don't know how hard you throw, and your revs etc, but I've no problem using ZC, playing down and in, and keep moving in and chase the oil as the pattern breaks down.
ZC is not so good with heavy carry down, but then it's not designed for that anyway.
I can using my ZC on fresh, medium and light oil pattern, and it's probably the best ball I own right now (see profile).
I've almost completely given up on my Prime Time.