Do you have paz browser? If not get it. You can extract stuff with it easily and check how things are linked.
If you extract this outfit you can tell, that it's using valkyrie texture and nova models:
View attachment 151976
So if you want to inject the ao-s, rename them to pvw_... PA did an optimization a long time ago. A lot of texture are shared between the classes. Sadly it's not obvious how they are shared, so you have to check case by case.
If the body is till cut after this, you will have to edit Partcutdesc.xml. Get "PartCutGen" for that. You can find it on the resources tab on this site.