One thing that kinda blows out any logic is the whole transfer thing. If there is a transfer … then … they turn into Palps AKA All the Sith/Whatever. So in a sense … it’s a take over. Even if it is not his specific consciousness … then it’s the influence of ALL the Sith, so it’s still a “win” for the Sith. Whoever get’s that transfer becomes The Sith Guy TM. So wouldn’t not matter who it is?
If Kylo slices Palps, he takes over Kylo. Now Kylo/Palps/Sith all faces Rey. Whoever wins, The Palpy/Sith All either stays or takes over. The only possible “lose” scenario is if he gets hit by his own lighting? I guess?
One of the reasons I don’t like this concept JJ and crew came up with.
It matters who it is. Of course, this once again relies on Midichlorians, but he needed the person with the most force potential to inherit the Sith spirit.
Furthermore, he needs the person killing him to be doing it out of anger and vengeance. Not as a Jedi.
It also doesn’t hurt to have the killing be more of an indirect method, yes. That would almost guarantee he couldn’t do anything.