About Rapax Females 

Initiate & Priestess
 
It can become very difficult to determine just which of ladies drop what. There are several different group of these gals in the Wizardry 8 database and they have enough similarities as to confuse the player when trying to determine who drops what items. I'll list them here so you can see the differences and hopefully be able to determine just who's who on the walk down the red carpet hallway. This is the only area where I have seen them spawn to date.
 
Initiates
Level
Appears With
Treasure List
Initiate 1 7 9 12 14 alone Rapax Regular
Initiate 2 7 9 10 11 alone Rapax Regular
Initiate 3 7 11 13 14 100% Rapax Patrol Rapax Female
Initiate 4 7 11 13 14 100% Rapax Bowman Rapax Regular
Initiate 5 7 12 15 17 100% Rapax Veteran Rapax Female
Initiate 6 7 13 16 18 100% Rapax Archer Rapax Female
So basically any Initiates appearing with Rapax Patrol, Veterans, and Archers (not Bowman) will drop the items from the Rapax Female list. One little discrepancy I have found is that I am sure I have gotten Rapax Female items from Initiates I found randomly wandering the hallway. I believe it was with the Priestesses who drop Rift Good items but the database file from DrHead does not show any other Initiate information. I know they're out there!
 
Priestess
Level
# in Group
Appears With
Treasure List
Priestess 1 11 15 18 20 2-4 100% Rapax Initiate 
0% Rapax Bowman		 Rift Good
Priestess 2 11 17 22 26 2-8 100% Rapax Berserker 
20% Rapax Archer		 Rapax Good
Priestess 3 11 13 16 18 1-2 100% Rapax Initiate 
0% Rapax Bowman		 Rapax Good
Priestess 4 11 18 20 25 3-5 100% Rapax Archer 
20% Rapax Samurai		 Rapax Good
Priestess 5 11 17 24 29 2-8 100% Rapax Priestess 
20% Rapax Archer		 Rapax Good
Now basically the only way to figure out which Priestess will drop Rift Good Items there needs to be 3 or 4 Priestesses with Initiates at level 15 or 20 or you won't be able to tell the difference between them and the Priestess 3 group since all the other information is similar. (Incidentally I think the Initiates with these ladies in the Priestess 1 group drop from Rapax Female.)

The fixed encounters with Rapax Priestess' in the Rift drop from the Rift Good Treasure List. This would include those in:

"Red carpet hallway"
The upper rooms with the Sanctum Key and FlameQuencher Wand
The two by the entrance to the Inner Sanctum
I believe the ones with the High Priestess (subject to verification)