Ah, OK, if the Dyad is mentioned later that’s grand, it doesn’t need to come up here. As for the inconsistency of what Palpatine wants Kylo to do, I agree that it’s a mess that needs a bit of fixing. I prefer the angle of “Palpatine wants me to fight you”, because then we can use this idea that the challenges are driving her towards the dark, rather than keeping Kylo as Rey’s equal in destiny for so long. I’d rather that he’s the tool to bring on her darkness - I think that fits better with how we’ve seen him manipulated and used onscreen, both by Snoke and Palps.
What do you think about "Imbued with his power, you… are a rightful Palpatine.”? I think it’s right to say she’s got some Palpy darkness but leave it ambiguous exactly how- so it can be headcanoned in a couple of ways without explicitly introducing something too new.