The Mod I Was Looking For

you are going to want this mod. Makes it so much easier to add items. AddItemMenu - Ultimate Mod Explorer

Thanks for that link. Definitely looks like it will make things easier.

I've also come across a mod that increases the blood and gore in Skyrim (the default blood is pretty minimal...Age of Conan goes far beyond that, including fatalities on a level you would expect from a roomful of people going at each other with swords and axes). I'm interested in defeat and ryona content for Kiri as well.

Blood
Going to need Sexlab for the abuse (do keep in mind sexlab needs FNIS and SKSE, be careful not to mix Skyrim Anniversary with Skyrim SE)
there are a few defeat mods for sex, likely this one is the one you want
I suggest you do one mod at time. I personally found a lot stuff works better like slavery when you role play instead of looking for mods because most the of slavery mods tend to bloat pretty badly. My personal house rull if the character gets captured and ends up sold by Simple Slavery the character gi gets a follower she has give all gear to to pay of 2,000 gold before she is free again.

and you will want this
and
I like this for more NPC slavery
This one scatters bits an pieces of woman arround various bandit lairs which makes troll dens quite horrific.

and, for the future; can do a lot with the mods to the NPCs as far as clothing goes and looks. For example this mod will allow a lot of customization to the NPCs including changing their appearance in game. Project Proteus

A lot of stuff to look at. I'll consider the slave packs, but I've got my eyes on the Naked defeat mod. I'm having trouble understanding the workings of the Diaper Lover's mod, but hoping I can get these running together. Kiri defeated soloing a dungeon wearing glossy rubber or plastic pants, and ending up tortured is exactly her character M.O.