Its only fitting that most green card draw sources either come in the form of creatures or rely on you having a strong creature presence in play
It can let you essentially use all your lands twice, all while forcing a discard from an opponent as if the land untapping wasn't good enough
In short, double-faced permanents cant be turned face-down and effects that attempt to do so simply dont interact with the double-faced permanent and dont change any of its characteristics
The nice thing about trading card games is that there isnt really one objective best game
You don't need the coloured mana for either for them to do most of what you want of them but you should have access to the colour at the very least before playing either
If I were to upgrade these decks with pulls from booster packs, then I would shave some of these weaker cards, especially ones that cannot be turned into ink, and add more five-drops, six-drops and seven-drops