I think the biggest problem with the game right now is the enemy's tendency toward doomstacks. Increased difficulty just increases the amount of resources enemies gain from nodes and they're very efficient about scooping up as many as possible.
Senators and Barons especially go apeshit with multiple 150+ stacks coming down on you. If you're not a very late game necromancer or something with the resources to plow through these armies over and over you're gonna get worn down eventually. And even if you are, that shit's boring.
I managed to get Ba'al as a high priestess. He's pretty rad. A spooky floating head with level 3 dark prayers and two spellcast slots. Rupture is a burst 100 that usually hits 20 or 30 people for 1-7 magic damage. Not crazy good but against chaff armies it can easily wipe out a good-sized chunk.
High priestess really starts ramping up overall once she gets her grand mastery. It takes a long-ass time to get there since she needs 480 sacrifices and her good spells eat towns, though. Grand Blood Feast summons a Nephil and a squad of Rephaim, but Feast of the Dead is the real shit. It summons an undead Malik and four or five Ditanim. Not only are they as stronk as the other giants, they're ethereal. Also unlike most undead they heal naturally. They can easily cut through hordes of chaff while the mages rupture everybody.
That actually segues into one of the issues I've been having with the game. Since you can't manufacture gear it's a lot harder to properly thug/SC. And you can't script your armies to make it work better either. The Malik and Ditanim are good because they're already ethereal, the others just die inevitably.
I don't think it'd be getting too much into Dominions territory to add army scripting and manufacturing items.
Not enough to bump. Got another endgame scenario, this time with Voice of El. I feel like Voice of El would be really exciting to play against, but playing as it is pretty boring. They're extremely resource-hungry, with gold and relics. Multiple rituals that need ot be cast multiple times, more expensive each time, but in exchange most of the effects of them are long-term and passive.
The seven seals are pretty rad. Cracking the first one gets you random flagellant chaff spawning in villages, along with the occasional saint who'll gather them up and lead them around for free. Later seals get more powerful spawns including packs of templar knights (the only controllable freespawn you get) and angels. Angels themselves range from pretty garbage to crazy strong. Archangels get mass combustion and falling fires and can smash small armies pretty easily. Very late game you also get Ophanim who are invulnerable to non-magic damage entirely, and get like three smites per turn anywhere on the battlefield.
All their freespawns are crazy strong for their cost (first seal is 50 relics, next is 100, and so on) but you can't control them so they tend to lone wolf, which really limits them. A couple ophanim supporting a real army would be unstoppable. Crusades and inquisitions also spawn huge armies with templars and siege equipment. All their freespawns like that are friendly and capture and convert territory for you, making El really passive and boring. You just sit there while your angels take over.
Then there's the four horsemen and the shit that goes down at the seventh seal. The horsemen are doom horror tier, pestilence diseases the entire battlefield and death leads a massive army of zombies and skellingtons, plus he zombifies everything he kills. I didn't see the others, unlike your freespawn the horsemen are their own faction so you can't see what they do unless they attack you.
When the seventh seal opens all kinds of crazy shit goes down. Plagues infect random armies, forests burn down, and awful monsters infest the world. Locusts with crowned human heads, disease demons, giant scorpions, all kinds of shit. They're aligned with horrors so they attack everything, including neutrals.
The final seal honestly is a little disappointing. It's not as apocalyptic as you'd expect, it puts on a ton of attrition with the plagues but the monsters aren't that strong and a big army can still push through them. I also didn't see any Grigori which was disappointing, but I guess they'd be more suited to High Priestess.
I've also heard that Satan is imprisoned in a pit somewhere in the Infernal plane, but if he is he didn't make an appearance, though the final seal does say "the bottomless pit is open"