sIKE I understand completely and please let me offer my apologies if it seemed in any way I was criticizing or attacking your spellbook and/or playstyle. I am far from an expert, just a very enthusiastic fan that plays the game every day while huddled for warmth in long winter nights.
However, as this is your thread on your book let's talk more about it! I am curious about how your games play out. What is the average duration of a duel with this specific priestess deck vs your warlock friend? I know you've started enjoying recent success against your warlock buddy, so I would love to know how you get your kill?
You do have two Elemental Wands, which suggest that is a key card, but I would happily trade shots with you if your wand is slinging Geyser or Jet Stream and I'm throwing Fireballs, Thunderbolts, Lightning Bolts, Drain Life etc. I suspect the wands are really to keep the geysers flowing to combat the Burns your warlock friend is dishing out?
With no weapons for your mage to wield, and no strong attack spells, I can only assume your creatures are the pain bringers. The archer is surely a strong a card, especially with a Hawkeye, but one alone can't project enough power and would (in my circle at least) die extremely fast as a priority target card.
The two knights are certainly incredible but with no Dawnbringers to get defense dice rerolls they aren't being fully maximized. As a side note, my preferred mage is the wizard of the lightning variety, so I don't get to see many Knights used against me.
The unicorn is a good creature and goes to great when it supports your forces, but with only 4 total other creatures possible the AOE regeneration isn't quite as strong. Assuming this is the big draw of the unicorn for your book (unless the Charge +2 is), I'd argue that perhaps a better creature could serve your deck as the Big Bad.
To answer your questions, the Warlock is the heavy favorite of all the players in my circle. (As much as they whine non-stop about how much they hate playing against the Wizard, they seem to hate actually playing him even more so.) When I play it is almost guaranteed that I am facing a Warlock.
As for my Priestess book, it is the usual "temple build" and as a wild over simplification it basically wins by either having a ridiculous reaction advantage with Hand/Dawnbreaker spam with the Temple of Light dealing heavy damage + control effects, or the enemy mage starts devoting resources to killing my temples which means they aren't hurting me or my creatures. It's a very tough choice to play against and I have always felt it was "too good" as a book strategy. When you add in the simply ridiculous ability the Priestess has to shoot Daze/Stun control around and it's just a ridiculous mage to fight.
As an aside, I had assumed the expansion would end the temple build with all the ballistas and the like, but I am hearing that the ballista didn't make it in the set, so maybe it will stay strong? *shrug*
Mostly, I am curious about how your book performs for you. I make a point to build books that don't counter one specific build like yours does, so between that paradigm shift and the meta shift from how your group plays versus mine, this is a fascinating thread!