Partners, Re-Sellers, EndCustomer/Buyer and mix types Structure

Any experience or solution how to best set-up and structure partners, re-sellers and endcustomer/buyers?

Currently we only use out of the box features (related partner list) which became quite confusing.

Basic set-up:

Opportunity where we serve Account A with type Customer (is paying us license fees) and Account B with Type Partner is doing the implementation->so we simply related the Account B on that Oppty with role "Implementation" (to document that this partner is working on that Oppty/account)

But when it comes to re-sellers it gets confusing. In this case an account with type partner(re-seller) is selling to a "end party"(endbuyer, client) and we receive royalties from the re-seller. with the "end party" we basically have no relations at all but still we want to somehow indicate this information that we can always tell to which "end parties" re-seller A sold and how much and so on.

In some special cases an account is also taking several roles (in one case its a re-seller partner, then its only an implementation partner and can also act as customer)

Thanks a lot of your feedback!