Looking at the walkthrough, I was that having a high slut reputation might affect the harem path. Does that mean it won't allow me to become the favorite concubine, or is it referring to something further down the line?
Viewing post in Caliross, The Shapeshifter's Legacy comments
You can only see the ending once in the game. Technically you could say it's not set in stone, but unless you use the debug tool, you aren't going to watch the ending sequence again afterward.
I'd have to double check, but I think you get a variation of the courtesan ending if you are the favourite while being involved with Eliza.
Did you check the walkthrough?
https://docs.google.com/document/d/16XOUX_KXz800cLQ7VledpazkEZjviWRPpXzR3iswfmE/...
Reading your comment I even decided to update the entry for the first puzzle in the first temple, hopefully the solution is clear enough to follow.