While I wouldn't recommending going deep on a 83 tix card, if you were holding off on finishing your Modern collection, this might be a window unless you really believe she will be reprinted this spring, in which case you should continue to hold off
The authentication and sealed holder provide long-term protection, especially for vintage cards and modern chase cards like alternate arts
These cards often encourage you to play cheap cards to overwhelm your opponents, but Akul puts its sacrifice ability towards cheating cards like Valgavoth, Terror Eater and It That Betrays into play
Unless there are budget concerns, theres really no reason to run Vizier when you could run Eladamri instead
Its an artifact that costs only 1B
Perhaps the ramp decks needed something to compete with Embercleave in their testing