Reflections of Littjara is ideal for any deck that runs blue, giving you extra value from every creature you cast
Armix, Filigree Thrasher could be a good inclusion, giving another way to put cards in your graveyard as well as removal
One thing Ive found effective in shaking up the play experience for either five-color commanders or multicolor commanders that are overpowered is restricting the color of cards you put in the deck
It doesn't copy whether Ran and Shaw are tapped or untapped, whether they have any counters on them or Auras or Equipment attached to them, or any non-copy effects that have changed their power, toughness, types, color, or so on
The highlight here is that they dont just explain what you should do and why, they also go over your opponents decision