After playing with this deck for a while, I've decided two things: I really like playing this deck, it's a lot of fun and consistently effective; and it needed a bit of a re-gearing.
The Kalonian Hydras are now in the sideboard and cut down to two. Five mana for a creature that often just gets killed and leaves me with nothing isn't worth it, but against aggro, and any other removal light decks, it's a cheap, fast, and reliable win con.
AEtherling has also gone to the sideboard, replaced in the mainboard by Elspeth, Son's Champion. While AEtherling is a more effective win condition, Elspeth isn't far behind and has a massive amount of added utility to her, allowing you to crawl out of terrible situations.
Loxodon Smiter is usually just a vanilla creature; people rarely see it as enough of a threat to want to counter it or Thoughtseize it away anyway, so there's honestly not much point to it. Brimaz, King of Oreskos is a generally better card, offering more value than Loxodon Smiter, and often leaving behind some annoying 1/1 chump blockers after it leaves.
Prophet of Kruphix is really fantastic, but there's no point to having more than one of her active, and her mana cost makes her a bit clunky, so she's down to two from three. After finding myself wishing so often for a Selesnya Charm to take out a Desecration Demon, Obzedat, or Mistcutter Hydra at instant speed, or for the ability to use it to push through for just that little bit more damage, I've used to space from the Prophet to add an extra one.
With the Kalonian Hydras gone from the mainboard, I wanted a new big creature, and since I sideboarded in Advent of the Wurm so regularly, I decided to go ahead and mainboard it.
In terms of the mana base, the scry lands are really fantastic at smoothing out questionable draws and helping to dig for threats or answers later on, so I wanted quite a few of them, but often there's a good reason for a turn two Fleecemane Lion or turn three Brimaz, so I didn't want to have half of the entire mana base always coming into play tapped. Getting shocked isn't the optimal solution either, so I've reduced the dependency on those now that all the necessary scry lands are available, stabilizing the mana base. Thanks largely to the fact that nine of the lands allow scrying, nine basic lands don't destabilize the mana too much, and allow for playing more effectively on the curve.
The biggest changes were to the sideboard. I originally had doubts about any number of Supreme Verdicts in a deck with a significant number of creatures, but it really is just devastating against aggro decks, especially devotion strategies. A monstrous Fleecemane Lion lives through it anyway, so board wipes often end with them with nothing, and me with an indestructible, hexproof 4/4. The Archangels, like the hydras, can be win cons against aggro, and help to recover life lost early on; the fact that they fly makes them especially useful against mono blue.
These changes were made over the past couple of days, and tonight I took the deck to FNM. Against a field of decks ranging from the common devotion and U/W control decks, to BUG control, Orzhov control, and a number of red/white/red&white aggressive decks, this deck came 2nd, winning three games and timing out on a fourth, leading to a draw. I'm quite pleased with this result, and intend to continue working on this deck, trying to perfect it while maintaining the core functionality.
tl;dr: I made some changes to the deck and it's good and fun.
