I know that on raw power, other cards are better than Ranar the Ever-Watchful, but I have a lot of fun with the janky foretell synergies
You can really set up an asymmetrical battlefield sweeper here by casting something like Naya Charm or Cryptic Command on an opponents end step, then untap and cast Dont Move
If you do a good job drafting Sultai Delve, these features will exist no matter what individual cards you wind up with
For example, lets say you have Jhoira, Weatherlight Captain in play and cast Karn, Legacy Reforged
The other bans take some of the stronger cards from the format
You can tear through the Undercity with cards like White Plume Adventurer or find your best cards with Fierce Empath and Imperial Recruiter and the like