NIR Definition Workflow Details-How to create without specifying Associated Entity/Business Entity

Gurus,

We have a requirement where we are trying to define NIR Definition Workflow Details. We see that Business Entity and Associated Entity both are mandatory fields. This translates into need to define a task for each Business Entity-Associated Entity combination and therefore a need for that many tasks to be executed. E.g. Business Entity 'Item relationships' has 5 Associated Entities, each creating a separate task. In our case for Business Entity 'Item catalog category' has 11 Associated entities. With just these 2 we are talking about 16 tasks. Most often these tasks are done by 2 or 3