I mean yeah, Drrazand's a tough fight, but it's already been nerfed (there used to be two Maralith casters in back that would spam high level AoEs on you). You don't need forever buff chains unless you want to play Unfair and that can be handled by Bubble Buff.
As can be seen in the pic
Tuco Benedicto Pacifico posted he has +24 Natural Armor which makes him very vulnerable to Touch Attacks. Max Rod an Enervation to soften him up if you don't have a nuker.
Obv Shatter Defenses is something people use a lot and that would shave off 9 AC (I'm using mod that requires hit at full AC to establish it but vanilla doesn't so all you have to do is Intimidate him, and there are several auto-Shaken effects by the time you get to him).
Divine Favor is +3 Luck, Touch of Good is +7 Sacred by this point if he has Sosiel (Domain Zealot recommended) but Seelah has Eaglesoul for +2 Sacred, Crusader's Edge is another +2 essentially untyped, and Heroism, Greater would be another +3 Morale over Bless. Eagle's Splendor (Mass or single target) is another +2 via the Smite, although she's usually better off getting Mark down first for rest of team.
So that's three long-lasting buffs you might as well cast after resting, two ten round buffs for the boss fight or one swift ability during the fight from Sosiel. She might also be able to Charge on her mount if positioned carfully for another +2.
That alone puts her at +45 with no more help from the team, and she can get to +49 if she turns off Power Attack since Smite already adds good bonus damage. With Shatter she'd be autohit, and even without she's at 75%.
I like to try to apply Sicken and Entangle if I can which takes a good bit off the AC, as does Archon's if you can beat the save, buit you get two bites from Cleric + Pal.
Blazing Parfait (favorite food) even gives her an additional +3 to hit
Here's a pic from just before that fight tanking the High Priest. Missing the +2 from Crusader's Edge since target isn't a Demon.
Half of the Pair is an item you get from Gheybor's Dragon (you buy the other half). Inspiring Sword is an ability from a mod (but could just get that bonus from Eaglesoul), Balanced Defender is a Sword from Labyrinth that gives her +3 to hit if she has a Shield equipped, Robe of Order is from Monk splash, Inspiring Command is Reg Domain, Godclaw Aura is Reg ability, Enforcing Gaze is from Aeon. But she also has -10 in maluses and doesn't have Smite up yet. Thst's what I mean by only needing endless buffs for Unfair, and I'm using most of those just to make up for the cost of getting her AC up to tank.
Don't forget Guidance cantrip if you don't have a Bard/Skald or Guarded Hearth for that Competence lol. Can use whole game.
This one is pretty funny