TNEW package with some optional dates on performances - Fixed? Flex? Super?

We are new to packages ... hoping for some input on setup. We have 6 performances in the package. We want to start with a fixed package that includes 6. Same venue - same prize zones. But four of these performances have 2 or 3 dates to choose from. What is the best way to set this up? I have groups for each individual performance, but I'm not seeing a way to set a rule that the package must contain only one performance from each group. Does it have to be a flex package? Or should I be looking at Super package? Then each grouping is really a subpackage? We'd like the option of doing a renewal next year. If our only option is to do this as a flex package, can we set it up so that the buyer makes one selection for price zone that applies across all performances? We are on TNEW. Bonus points for any insight into setup tips that help with analytics. Thanks!