I suppose you might think of this list this way: if someone else has them on the battlefield, are you likely to want to get rid of them
If you play a lot of wheels and spells or abilities that loot through cards, this is worth a look and multiply that recommendation by 100 if your Commander discards cards, as I feel its close to an auto include if it does
I already said I was in
A lot of the effects are symmetrical (Braids, Gate to the Aether, Horn of Greed) but I 1) hope that having better card selection through Arjun will let me take better advantage of them and 2) I will bust this deck out when it's time for a big fun swingy (and possibly quick) game of EDH.
Through being partnered with commanders of different colors, Krark can be used to double the value of black removal spells, blue card draw, green mana ramp
Its a nice little bonus feature of the card