Another thing to think about is not really color balance, but rather fairness balance
A 4/3/1 Evasive for 4 is not good
Elemental Bond is probably the one Id get first, because it can trigger off of tokens, has no restrictions to how often it can trigger, and gates the trigger at three rather than four
Panharmonicon Combo While a lot of early Panharmonicon builds mostly focused on using the artifact for value, eventually, we realized it was possible to use Panharmonicon as a combo piece
There are a number of auras that give shroud to the creature that theyre attached to, like Aspect of Mongoose
While Farseek can retrieve basic lands, it will serve you much better by retrieving nonbasic lands with basic land types like Temple Garden, Bayou, or Cinder Glade that way youre fixing your mana while ramping