Rivals and levels question

Against my better judgement, I'm thinking of trying to fight the other rivals again. The Coda are fun and the best introduction that they could possibly do with the rivals. But i've gained quite a lot of power since the kuva guys being forced on me and getting punished for no reason. But I don't know how strong the rivals are, and I am NOT going to interact with a kuva if I'm not sure I can beat him. So my question is pretty simple.

Comparing to the star chart, where exactly are these guys in power?

And I don't mean like just telling me their level because obviously I know that a earth kuva is level 50. Level does not help in this game, not really. I'm specifically asking, like, if you can handle this planet or this mechanic, you can handle this rival. As an example, you can handle netracell so you can handle a sister of Paravos. So my question is, at what point of the game can you comfortably handle all of the rivals.

As a side thing as well, I've already looked up quite a lot of information on how to beat them easily. Like I know with the Kuva, I just have to only stab when I know for sure it's going to succeed and then run away from him when I'm not because the failed stab is what makes him stronger. So, again, I'm mostly just trying to figure out where in the system where all rivals are comfortably fightable.