Here's a bunch of Born of the Gods fatties and how they fare in Mayael the Anima commander decks.
A fine creature, but not for everyone. This best comes into play if your deck doesn't have a lot of built in evasion (flyers, tramples, things that grant either), or if your opponents are playing against a lot of low toughness creatures and this guy becomes a differently-abled Shivan Hellkite. I think the flexibility makes it better off because one of the two options will almost always be viable. The biggest hit against this guy is that there are so VERY many good six drops for Mayael that there's probably something more proactive you could be running instead.
Archetype of Endurance
"Your win conditions have hexproof." Yes. Please. I love this guy, especially because Mayael decks will inevitably have so many ways of doing it at instant speed (Mayael herself, Elvish Piper, Quicksilver Amulet, etc). 8 mana is really expensive for a guy that's not caving skulls in or removal on a stick, but the effect is so powerful, I'd recommend trying it.
Nessian Wilds Ravager
There's one thing in particular I like to keep in mind when I'm putting cards in my EDH decks. One, how practical is this card. Especially in my Mayael deck, which demands a certain amount of slots in the deck to make Mayael a reliable asset, every fatty needs to be earning its space. To that end, I try to make sure that most of my fatties can either win the game on their own, or are an answer to an opponents plans. This guy, when considering it as a removal spell attached to a body, is a mostly worse Gruul Ragebeast. And you know what, that's fine.
Because of the singleton nature of the format, having built in redundancies in any deck is key in this format. And by playing this along Ragebeast gives you a minimum of two chances to draw into "kill your dude, I get a 6/6". Yes, I meant what I said. Carefully read Tribute's rules text. "As this creature enters the battlefield, an opponent of your choice may place six +1/+1 counters on it." That means the player paying tribute doesn't have to be the same one you're going to fight creatures with. This makes for a wonderful bit of politics. You can choose a player whose disadvantaged at the moment, or has a grudge against the player you want to spite, and if they're feeling appropriately generous, they'll let you get your fight on. Your level of charisma may vary, results not a guarantee.
A fine fatty, but perhaps not ideal for this deck. The thing is Mayael has a lot of ways of putting fatties int play that aren't casting them, and because of that we're getting less triggers than a deck built around Karametra's abilities (such as an EDH deck with her at the helm) would. Being big and hard to kill isn't enough in my eyes.
Limited chaffe. Use at your own risk.
Making dudes is sweet, but we have more efficient ways of doing so.
I really like haste, and I REALLY like the art, but I really don't think being big is enough in EDH (unless you're really big). Plus, Bull Cerodon does this and has the decency to block afterwards.
I freaking love this guy. Giving haste is a big deal. Making things enormous is a big deal. Both of these things tied onto body that is really hard to get rid of is a big deal. One of my favorite inclusions in this deck in recent years, and my commandering is all that much more better off because of it.
Those are my thoughts and feelings regarding the fatties of Born of the Gods. I'd love to know what you think! Happy commandering!