So...I have been playing an updated combo deck that has been doing decently. I was tired of all the normal decks, so I tried to tune the Mono Blue Devotion...and it is working pretty well. I am guessing at higher ranks, people will know how to handle it better, but it is decently fast and like any good mono blue combo deck, it runs very few (16) lands! (Okay, just talking academy, but still)
4 Unsummon (Kinda flex spot. Early defense and later good to continue combo)
4 Witching wells (Early get some lands, later combo pieces and/or draw + minor devotion)
4 Corridor Monitor (Combo piece and early defense)
4 Oment of the sea (Another land replacement that gets you devotion and late game draw)
4 Renowned Weaponsmith (Early defense, and kinda a mana elf with Monitors, and Lotus. Bonus, Make Wishing Well cost 2 mana for a draw)
4 Thassa's Oracle (More ways to find pieces early and late game kill)
4 Brazen Borrower (Early game defense, late game source of devotion)
4 Callaphe, Beloved of the Sea (Alternate win condition. Mainly devotion, but makes Elspeth cost 6 as well)
4 Kiora, Behemoth Beckoner (Combo piece)
4 Nyx Lots (THE combo piece)
4 Gadwick, the Wizened (Main draw and combo piece)
12 Island
4 Castle Vantress
Basically, mulligan if you have less than two land, but with two land, and some sort of draw/scry you should be fine. This is much lower to the ground then others, and I think that helps make it more consistent. No Cavaliers or Owls here.
Good sequence is:
T1 Land, Well
T2 Weaponsmoth
T3 Kiora and use to untap Weaponsmith to play Lotus.
This does not happen often, but it does happen enough to be noticeable
t4 Well, if you have a Gadwick, you may win T4. You have 3-4 land, and 3 devotion. That is 9-10 mana. Gadwick for 3-4 and have 6 mana open (from untap with Kiora) you have 49 cards left in deck, and 7 more untap options that you can play with 3 mana and 3-4 chances of hitting one. As the combo goes and you Gadwick more, always try and leave 3 mana open. For Kiora or Unsummon + replay Monitor.
Good news is that generally games are over by T6 in most cases, either you win or you rare broken beyond repair. The bad news is that the last turn takes forever.
Anyway, this deck is not a top deck now, but depending what comes in the next set, it has possibilities. And it really is a pure combo deck