>>42713001
DoWaS is the easiest. The princesses don't die unless they're killed.
9DD is probably the best with its trisoul model, where their corporeal self "synchronizes" to their cosmic soul at the appointed time and while their corporeal form can be killed, they are reconstituted from their cosmic soul, having forgotten what happened since the last "synchronization."

There's also all kinds of transequinism. Granting immortality by stripping a god of its destiny and transferring it, getting starstuff shoved into you, becoming fused with the nature of reality itself...

And there's still necromancy, like lichhood.