Finally, the ultimate isn't even good all the timeif you are winning and have a decent board, you might want to keep your own permanents rather than take your opponent's, especially since Aminatou, the Fateshifter is more about synergy than raw power, so your cards will likely be more valuable to your deck than your opponent's cards
Plus, once we get closer to the Star Trek set, we'll be getting a whole lot of Spacecraft support, which means it might be Inspirit's time to shine
If you find that you still have too many cards to sift through, I suggest sorting into categories like targeted removal, mass removal, ramp, and card draw
But what if I told you there are spells that act as one-sided board wipes, affecting only your opponents' side of the field while leaving yours intact