Thats because trampling over with big numbers is part and parcel of being in green, and because generally green has plenty of redundant effects and redundant win conditions, so the support cards are way more important
Even with the currently small initial pool of 204 cards, the metagame has proven surprisingly diverse
No one told me Adeline, Resplendent Cathar was converted to animal form
It sounds simple in concept, but in practice, you'll be facing down blocking creatures and lifegain getting in the way of your deadly plans
Alpha Status might be worth playing in non-tribal - it can make tokens very large, buff respectably a resilient creature - though sadly being open to a 2 for 1 Doom Blade
This versatile tutor can summon up anything you need, from a Badgermole Cub for extra ramp, to a Reclamation Sage to handle a tricky permanent, to Craterhoof Behemoth when it's time to win the game