I need help to create some cross-validation rules a little complex

I have an Accounting Flexfield with 9 segments and I need to prevent the creation of some accounts that are using 4 of these 9 segments.

The segments I have are: Company, Cost Center, Account, Project, Task, Item, Intercompany, Customer and Future.

There are a few accounts that only require the Cost Center, but others, need validation for Cost Center, Project, Item and Customer.

I have tried many ways to create the rules, especially in the case of the 4 segments and there are conditions that are not evaluated.

I need some advice, besides of the ones that are in the manuals.

Thanks in advance for your help.