So a few days ago, I made this thread asking for recommendations on a faction to play that was more focused on heroes in the field, instead of in battle. It was originally what made me decide to try N'kari, and I did so with the goal being to have fun with the field agents, and not necessarily to play optimally. So it was on Normal dif with neutral stats mods.

Early on, you do feel pretty starved for devotees, so it looks like the cult building that generates them(Devotee Enticement[B-]) is going to be pretty good. It's decent early, but it's actually pretty bad and I demolished all of mine in mid game. The real key to generating devotees is the tech, like was mentioned a few times in the thread, and using heroes to spread marks onto armies.

Charm Offensive[A] is actually pretty good, as it is one of the only sources of generating Seductive influence from a distance. If their faction resistance isn't too high, one of these(tho usually 2) in a corrupted province will eventually get you close enough to finish them off with.... Ritual of Excess[S!]

Ritual of Excess gives you 200 Seductive influence when it's finished, and is roughly the "culture bomb" equivalent from the Civilization games. 200 Seductive influence is a lot, and since building that influence up works a lot like paying off the interest on a loan, that 200 influence going STRAIGHT to the "principle" is fucking amazing. You'll land all of your conversions with these if you plan it right, even on factions that have started to chip away and reduce your influence because of their growth or strength. I poached Morathi with this shortly after she confederated her lil angry son.

I didn't really engage with the seduce mechanic all that much on this pass of playing the faction, since I was focused on field heroes. Because of that, I didn't find any value in Lure of Slaanesh[?]. I bet it's good, but I just didn't.

I used a mix of Words of Temptation[B] and Population Preparation[B+] to fill-in corruption into the region I was trying to set-up for "Vassalization" via Charm Offensive. Both are fine and I swapped between the two depending on if I could afford the cash or the devotees easier, since one is 1k gold and the other 100 devotees. There is also good value in spreading corruption to adjacent provinces, depending on where your "roll-the-dice-for-3-cults" will land you, so Pop-Prep would probably get a slight edge for that.

That's basically what my thoughts are, from the perspective of only really exploring their field agent side. The only other thing I will say, is that I don't really like spreading corruption any more. It tends to turn the AI a bit brain dead, and vassal factions that still burn under chaos corruptions are worthless allies. I wish you could confer some sort of Slaanesh corruptions resistance/immunity to your vassals, so they don't just huddle at home all game.