Nicholas Byrds Modern Open-winning version gives us an idea for what might be cut, with only three Pentad Prism (among other cuts, like Laboratory Maniac in the sideboard)
What are your favorite mandatory loop combos
Up the Beanstalk isnt really a problem right now, but if Standard slows down after the next ban announcement, Dark Confidant could be the card that lets a bunch of smaller mana value decks tick
The equipped creature copies exactly what's printed on the exiled card and nothing else
There are cards that are both threats and answers (such as Teferi, Hero of Dominaria or Sandwurm Convergence), but KernTheGerm gave us this nugget of wisdom: there are no wrong threats, only wrong answers
Some players are even considering this for cEDH play