Playtesting Enduring Renewal decks with my modern group. Found a few things kind of nifty, don't know if they're of any use.
-Ranger of Eos can tutor out Viscera Seer and Wild Cantor, along with all of the 0-cost artifact creatures and disciple of the vault.
-Obviously, beck makes the deck a little bit insane. In the affinity version (literally just an affinity shell with a few cards stripped out for beck/renewal and a worse manabase,) there's a surprising amount of fun to be had.
-Ranger of Eos for Viscera Seer + Ornithopter, with Enduring Renewal out, lets you bubble sort your deck.
-Retract is a really fun (but really bad) card. When it costs neutral mana due to bucking back your Mox Opals and draws you 5 cards, it's a little nutty. Obviously, it makes the decks far too reliant on combo to be good (as it's unplayable without combo pieces already out,) but whatever, we're still developing.
-Life//Death chains with Faith's Reward/Second Sunrise and sac outlets are fucking hilarious. Squandered Resources, why aren't you in modern?
It's nowhere near as consistent or resilient as elves, but it's an insanely fun combo deck. Not to mention that Enduring Renewal is still like fifty cents.