Doesn’t he state that pretty directly?
The problem is that his intentions are not clear, so he wants kylo to kill her first, then he wants to take his body, then he discovers the dyad and uses it to recover… i don’t know if he had a plan with rey and kylo to begin with or if he was making in it on the go.
Exactly. JJ had no idea what to do with his own characters.
Is funny that Rian didn’t use the Knights of Ren on the throne scene because he didn’t want them to be wasted, but JJ didn’t knew what to do with them, so they were useless and were killed easier than Snoke guards.