Samudragupta defeated how many rulers of Aryavarta and Dakshinapatha respectively?

The Prayag Prashasti lists nine rulers of Aryavarta who were uprooted and twelve rulers of Dakshinapatha who were defeated and then reinstated under different terms. This question belongs to the Gupta and post-Gupta phase, a period reconstructed through inscriptions, coins, monuments, literary works, scientific texts and accounts of foreign travellers. A reliable answer must connect the named ruler, author, work, institution, title or event with the correct chronology and source. The Gupta age is often described as a classical or golden age because of important achievements in Sanskrit literature, temple architecture, sculpture, astronomy and mathematics, but the label should not conceal regional diversity or social and political change.