[Having made an embarrassing mistake, I might as well continue with some openly-voiced musings...]
Ok, I'm not trying to break this build, just trying to understand its parameters by matching it against other top tier builds.
GOLEM PIT
I can see it is a very strong choice against Wizard Slow creatures, especially Jelly/Golem with Temple of Light. Golem Pit accepted Priestess was its weakness (hence mixed in Living) as she out-turtles, has Light attacks (here Temple) and Divine Intervention so she's was an excellent choice anticipating Earth Wizard.
WATERGATE
This is slightly harder I expect but Meditating even denies Gate to Voltari mana! Problem is books will focus on Jelly probably. I assume Archers come out here? Another long game but nobody turtles better than Priestess. Again a good choice as she's incredibly resilient.
BRUTE SQUAD
Against Zombie Brute Squad (14 Channel and 4 Brutes emerging from FC by turn 5), Temple of Light causes problems (Wall of Bones blocks) but so does Deathlock (Angels) & Pestilence once Priestess is wounded beyond Minor Heal range. Then again she has Divine Intervention to escape a Wall of Bones cornering to regroup and destroy Deathlock/Pestilence in my corner, abandons Temple of Asrya to the Zombies but just hard summons, her creature base is bigger (4 Brutes, 1 Shaggoth, 1 Plague) so I can see with good play, she will win a war of attrition. But it's touch and go as Brute Squad brutally punishes mistakes and usually only fears Jelly/Golems/Whirling Spirit (and well played Skeletons). But this build has a good game against Brute Squad as corner-to-corner Divine Intervention is too much tempo loss and it will attrition it once Deathlock is destroyed. Advantage Priestess.
MANA DENIAL + CURSES
What about Curses? Against Enchantment Transfusion of a stack of negative enchants like Force Crush etc, I assume this build goes aggressive to disrupt the build up. She has Purify for action-saving multi-removal too. Plus Divine Intervention foils anything - does that mean the Transfusing Enchantments are all lost? Hmmm, I feel Wizard Mana Denial with Curses like Dude's "Highly Calibrated Wizard" or Shadow's Earth Wizard (with DvN cards) may still be a problem. Charmyna has been alluding to his "Blasting Banker" which seems a hybrid of Curses and Distance Nuking with Mana Denial, upgrade on Warlock because of Wizard's Tower. Lack of 1 Purge Magic which most Wizards have against this (and Beastmaster/Forcemaster) may be an issue here...
DRUID
Don't know much about her so I really can't comment.
ACG plays Defensive Samara Treee Meditation Amulet + Flowers.
Aylin plays Aggressive Vine Tree which is where my preference is.
But the level 3 creature quality that Holy has may be too much.
Especially if you give her time to Armour Up with her Crown etc.
HYPER-AGGRO
Maybe Living Hyper-Aggro is its weakness? Surely this Priestess build invests too heavily in infrastructure at the start to cope with it?
An old-fashion aggro Fire Warlock like a Bashcon Beatdown variant (updated 1 year) may be a problem. But Guardian Angel wasn't around back then.
How does it cope against the simple Beastmaster Forge + Beast Ring + Enchanter's Ring "Aggro Tempo"? It has access to usually 2 Mongoose Agility (timed revealed), Eaglewings on Cervere etc? Maybe even toolbox Falcon Precision This old chestnut may actually be her hardest match because it attacks Priestess' corner in round 2 with 4 dice and then doesn't stop, ending up with a Voltron equipped Beastmaster. These Mid range Spawnpoint builds were meat and drink to that build so I reckon Beastmaster will win. It's only Wizards' slow game that has made Mid Range Spawnpoint viable again. I don't fancy the Priestess' chances. Still, she will armour up pretty fast...
Also Tarkin managed to beat a 2 Grizzlies Forcemaster build and you can't get more Hyper Aggro than that!
I suspect that was his play skill as you don't get to be European Champion at AGOT unless you're top notch.
Though it's a Final so doubt his opponent was a slouch - Madrid's AGOT Meta also have a World champion.
Whatever, this build shows it's really good that Holy is there to make sure Nonliving is not too dominant.
Rejoice, the meta is alive, there's a paper-scissors-stone-lizard-spock of builds to out-predict your opponents.
(A shame that tournament game lengths may destroy the viability of some counter-strategies.)