What are the key abilities and strategies to consider when building a deck around MTG's Ranar the Ever-Watchful?

When building a deck around MTG's Ranar the Ever-Watchful, key abilities and strategies to consider include focusing on creating a deck with a high number of cheap spells to trigger Ranar's ability to create Spirit tokens, including cards that protect Ranar and the Spirits, and incorporating cards that synergize well with the token generation strategy, such as cards that benefit from having multiple creatures on the battlefield.