How far in are you?
I'm at Drezen and the game kind of fucking sucks. The story and characters are fun but it's just continually reaffirmed for me that Pathfinder is the worst version of D&D. It eventually just becomes this endless slog of applying and reapplying fifty buffs and fighting monsters with enormous stats, resistances, and immunities, pigeonholing you into specific strats and making a lot of stuff completely pointless. If your spell pen checks and save DCs aren't huge don't even bother casting offensive spells. Mythic stuff lets you break the rules in some ways so it may get better at that point, I'm almost there, but right now I'm really struggling to stay engaged with the combat. It sucks cause I really like the characters and I'm reasonably interested in where the story is going, and I've already lowered the difficulty once and I don't really want to do it again but I'm thinking about it. Or playing something else, I dunno. Solasta looks cool, and stuff like pillars of eternity that use their own ruleset.
I used to be a hard recommend on this but I'm not sure anymore.
I'm past Drezen, wiped out all the current demon armies, and am working through the story.
This is what I went with, character-wise:
1: Feyspeaker (Druid) + centipede
2. Sacred Huntsmaster (Inq) + raptor
3. Wildland Shaman + leopard
4. Sylvan Sorcerer + monitor_lizard
5. Wizard Scroll Savant (Nenio)
6. Arcane Rider (Magus) + smilodon
So that's my Gnome Druid, Nenio, and 4 Gnome Mercs + 5 animal companions. It's quite the endeavor sometimes to get positioned, but so far, so good.
My intention was to go 3 divine + animal companion plus 3 arcane + animal companion, but the wizard is pretty handy, although I hate the opposing schools mechanic Nenio has.
With spell penetration and boosting stats appropriately, being a spellcaster isn't too bad, but there are more than a few fights where the Animal Companions win the day. Greater magic fang, natural attack buffs, teamwork feats for each of them. For the first time (for me), outfitting animal companions with equipment actually has merit.
In any case, the whole crusade/campaign/armies against the demons is an interesting thing. I'm not really sure what their goal was, but some fights require literal thousandS of units to win some battles. But you can (by default) only recruit <=22 per week of some units. And you can't put more than 3 unit types into one army, without certain ranks in skills your generals may never get. They try to address it with certain events that grant Maneuvers I to all generals, but seriously.. why not just start at 4? Why do I have 9 types of units if I can use 3? Why can't 3 armies under 3 generals actually travel and attack together? Nope! You all get to die alone, 3 unit types at a time. Huzzah.
I kind of understand the intent.. you're supposed to, I think, advance the levels of your crusade (logistics, military, diplomacy, whatever) and as you do, you can choose different unit types.
The problem is, unless you know ahead of time that energy resistance, damage resistance, spell resistance and AC of your enemies is SO high.. you can't/shouldn't really choose m/any defensive unit types. And, afaik, you can't undo or redo those choices.
If you choose badly, sucks to be you, those units can't hit any enemies, full stop. No matter how many buffs are applied by your general to your units, nor how many debuffs are applied by your general to the enemy units. So you end up with being forced into an army of glass cannons, and losses are truly staggering, but it's the only way to win some fights because the enemy units are simply invulnerable, otherwise.
We're talking about things like immunity to 3,4 or more damage types, plus full and continuous immobilization of ALL of your units, while the demons teleport freely around the theatre/battlefield and wipe out half your units in one hit. Eventually you get things like Marksman with a +36 to hit, and that helps, but enemy units target them first, and of course with teleportation, you can't prevent them from crushing them after they shoot once. I mean, when your best infantry has +6, and all enemies on the field start with DR10, you're gonna have a bad time.
Once you start getting to the fights with 4-6 giant teleporting/caster/summoning/immobilizing/charming demons... well, yeah, against your 3 unit types of AC7/1d4+6 you lose. 100%.
Objectively, some of the 'foot soldiers' of the enemy are more powerful than a level 20 ally general, and that seems a tad overpowered.
As a result, to Cthulu's point above, I've had to cheat the hell out of the game in order to play through at a reasonable pace or with any semblance of 'fun'. Of course, sometimes, fun is in the eye of the beholder, but trying to fight some of these armies is just..not possible, mathematically. In fact, even WITH cheating and adding thousandS of units, I still lost some of those battles, that's how tilted the playing field is, in favor of the demons.
Personally, I am simply trying to play through, once, without spending weeks of "skip day" and being subjected to endless sieges. So, yeah, I too am just sacrificing everything to advance the story, which is really too bad, because some of the mechanics seem like they could be fun, situationally.
The party/ally AI is as bad as or worse than Divinity:Original Sin, Sword Coast Legends, or Pillars of Eternity. You can't really (again, afaik) control what they're going to do other than Ranged, Melee (by weapons) or repeatedly cast one particular spell or use one particular ability. That's it. So you end up with casters that have dozens of available spells, but they use one, because babysitting them during combat just prolongs the fights and you're back to slogging. Honestly, I don't blame the players for min-maxing/optimizing, because otherwise, you're faced with the very real possibility of being unable to progress via party combat because you've come across some creature(s) with immunity to everything, DR10+, and 36+AC.
I do find it kind of.. silly? amusing? ridiculous? that they had to add damage immunity
bypasses for casters in the Mythic paths. I mean.. c'mon. If you have so much energy immunity that you have to bypass a core mechanic, maybe that core mechanic isn't really well balanced?
Anyway, I'm still progressing, but I'm not sure it's an actual winnable game via playing as intended. Maybe I'm playing it wrong.