If you destroy him, what happens to his paradises? Will everyone in them be ejected, or destroyed?

... Can you stop time, with an open invite to the other Glitchers to join you in the same time frame, so you can just talk to them freely without Savior knowing or having time to react? Just say "Ok, I want to talk to my bros" and snap your fingers and when they join you in the same time frame just say hello and start talking. Because, you know, it seems like it'd be pretty easy to convince them to stand by. There's lots to say to them; he's just treating them like tool, he doesn't really believe that you're a real person, he doesn't seem like he even realizes you could.

Savior says their urge is to self-preservation, and then he's going "hey I'll throw these guys' corpses in your way so i can run away and then just be a dick", is that anything resembling any promises he made to them? You can destroy them, and if Savior is forcing you like this you will, but you don't want to. Rulekeeper can probably give them sweet new power and clarity just like she did you - and you know, if probably does wonders for that whole "Glitchers don't last long" thing - and if you get the chance to examine Savior's strings unimpeded, then together with Rulekeeper's authority chances are you'll figure a way to do everything he can do, and you'll be able to give them anything he could give them.

As for his bother about the cycle ending or the creators doing something... Savior just admitted he has no idea what he's even supposed to do. He thinks he knows what the creators want? Does he think they're all-knowing or all-powerful, even here? The fact things are so messed up shows that they're not. Maybe the way Savior wants to keep things is something the creators DON'T like, that they want to fix, but they can't, because we can only do it from in here. Maybe not, but maybe so, we don't know, that's the point. You definitely don't want to risk destroying everything, your whole goal is to save as many as possible. If they don't believe you, they can look at your history, because that's a thing Glitchers can do. They can see exactly where you're coming from and why you're doing the things you're doing.

And if that doesn't convince, them, ask them: what is it they want? Each of them, individually. They're not just identical Glitcher mooks, they're each people too, with their own histories, their own stories. Saviors can't control Glitchers directly. They're not puppets. Let's talk. Let's solve this the way Alison would, with the power of friendship.

THEN destroy him.