The supporting cast aren't bad, but they aren't that good either. I'll be honest, they are there to either be the Doctor's 'guide' or the folks he's meant to save. They feel very stationary which surprisingly doesn't get in the way of the story as there is a lot going on and the focus is mostly on Six/Rani. That wasn't me shipping them by the way. That's just how I wrote it.
The setting for this story is somewhat usual as well, including the name of course. This story has some weird ideas running through it that actually comes into play at certain stages, but I won't say when or how, but it is rather clever, even if it does feel like it was specifically put into the story just to serve that one purpose.
I had a couple of worries about the post-reunion fight with the Doctor and Peri and that this incident with Peri and Kiv would be handwaved away. It seems to be heading that way, but they do touch upon the subject in this tale as well, leading me to believe that instead of one large explosion, we'll see cracks forming that build up to this confrontation. Unlike the Classic Era, Big Finish really plays up the realism and character development of their characters so I'm willing to wait and see what they have in store for us.
Another thing that makes this story severely freaking awesome is the music! I need to mention this. I know I don't talk about it much and I know Big Finish does a great job with the music normally, but The Rani Elite featured some of the eeriest, creepiest - freakiest! - background tunes ever. It's very reminiscent of Night Thoughts and Dark Water. This fits in well with the Rani and her rather dubious schemes.