I have a few things put together that involve the newly spoiled archangel of thune. It's not as life-gain centered as the big existing decks but there are some borrowed concepts.
This is a more straight-up creature centered deck concept that has two built in infinite combos. One being Spike feeder plus archangel of thune and the other - which is admittedly unlikely to go off - being two kitchen finks plus grafted wargear plus archangel of thune.
Tested twice against jund and both times it went to a stalled board state before eventually resulting in a creature too big for jund to handle. Scavenging ooze is the mvp. The lifegain is more than just an incidental effect. Dont like giving away free lands and being forced to rely on condemn so i might change the creature control. Also considered trostani over rhox but rhox seemed more effective. If either of the combo conditions are ever fulfilled it's an instant win but the deck more often plays like midrange.