Lenoxsoft currently has prospect data in another email-sending platform, and they want to migrate it over to Pardot. The system has a list of mailable prospects and a list of unmailable prospects who unsubscribed/opted-out that do NOT exist in Salesforce. The marketing team wants to make sure that they stay complaint with the permission-based Marketing Policy while maintaining their database of unsubscribed/opted out prospects when they migrate this data over to Pardot. How should the data be imported?

Is it possible to split Dynamic List to other Dynamic Lists?

LenoxSoft does not use the Leads object in their Salesforce instance. This requires Pardot to create Contacts only if a new prospect record is created in Pardot and then assigned to a sales user. The sales manager also requires assignments to be distributed evenly across the sales teams.
How should LenoxSoft get started?

Which editions of Pardot provides Buisness Units and Einstein functionalities

One of LenoxSoft's goals is to effectively use engagement studio programs to continuously reengage cold leads until they become active. To do so, the marketing team needs to build a list of cold prospects.
What is the optimal use case to segment these prospects?