Sakura-Tribe Elder ramps while sacrificing itself, Viscera Seer is the free sac outlet to control timing, Plaguecrafter keeps everyone honest, and Spore Frog, well, fogs combat over and over
The Fire Crystal certainly seems the best of the bunch in a vacuum, thanks to offering effects that are interesting for a multitude of different strategies
The indestructible counter will hopefully allow you to take advantage of the doubling effect and reduce the effectiveness of your opponents board wipes (the scourge of token decks), and makes Mondrak an excellent token commander
Banishing Light The most interesting things about this card aren't even about this card
Having this sort of ramp attached to your commander makes it incredibly difficult to keep Choco off the battlefield, and the Bant colors gives you access to counterspells and things like Teferi's ProtectionTeferi's Protection to protect your growing Bird army from battlefield sweepers
If the triggered ability causes two or more Monks to be created (due to an effect such as that of Doubling Season), you may choose to attach Cori-Steel Cutter to one of them