Yes, selling cards can be a little slow, but it's worth the time you spend on it
Theres no format to balance it for, since its as legal as silver-bordered cards, but silver-bordered cards are actually designed to be played against each other
And lets not forget the original Jayemdae Tome, the original inspiration for these decks, and this article
Ryida, Summoner of Mist Fitting in with the limited theme of landfall for Red/Green Rydia rummages whenever you play a land, and can exploit that by hastily resurrecting the various summons in the set represented as enchantment creatures
While Modern Horizons 3 as a whole is pretty pointedly focused on catering to the Modern format, that doesnt exclude it from having Commander decks as part of its product lineup
Monks are far better with fisticuffs than any other weapon