One cited deathFate of the Jedi: Apocalypse · 2012
Does this death move the ranking?

It didn't stick

The record shows a kill. It was reversed, so the ranking does not move.

Luke Skywalker vs Abeloth

The killerLuke SkywalkerStar Wars · rank 3
The victimAbelothStar Wars · off the scale

It did not stick, and the victim was never on the scale to begin with. Outliving her own deaths is not a footnote to that entry; it is the substance of it, and this occasion ends in a change of host rather than an ending. Third place credits a share rather than a kill, which is the record being precise about an assault mounted on three fronts by two traditions at once. The standing order issued afterwards — find the weapon that would work next time — is the books conceding the point in advance. A reversed death measures what it costs to put something down, never whether it stayed down.

The connecting record

shownundoneFate of the Jedi: Apocalypse · 2012

Luke Skywalker killed Abeloth in Fate of the Jedi: Apocalypse.

she moved into Callista Ming instead

What each of them is ranked on

The killer · Luke Skywalker · rank 3

Grand Master era — Legends novels

legendsnovelcontested

The farm boy is not the same character forty years of novels later. Battle mind-walking past death and back, a Force storm turned around on the man who cast it, and a share in the kill on Abeloth. The Legends version of this character kept accumulating for forty years; the canon one never got the chance.

  • shownFate of the Jedi: Abyss · 2009

    Mind-walks beyond shadows into the realm of the dead and comes back.

  • shownFate of the Jedi: Apocalypse · 2012

    Vanquishes Abeloth in the Beyond Shadows, one of three simultaneous fronts against her.

  • shownDark Empire · 1992

    Turns a Force storm back on Palpatine, with Leia lending her strength.

Luke Skywalker on the Star Wars ladder

The victim · Abeloth · off the scale

The Mother — Fate of the Jedi novels

legendsnovelcontested

A mortal who drank from the Font of Power and came back as something else. She hops bodies across the galaxy, pours madness into Jedi light-years away, and dies repeatedly without staying dead. Putting her down took Jedi and Sith hitting her on three fronts at once, and Luke still left a standing order to find the one weapon that could finish her if she came back.

  • shownFate of the Jedi: Outcast · 2009

    Valin Horn breaks down believing everyone around him is an impostor, the first case of a madness the Order cannot explain.

  • shownFate of the Jedi: Apocalypse · 2012

    She originates as a mortal servant who drank from the Font of Power.

  • shownFate of the Jedi: Apocalypse · 2012

    Putting her down at all takes Jedi and Sith attacking on three fronts at once.

Abeloth on the Star Wars ladder

What this does not settle

One death in one work. It is the only place the record puts these two in the same room, and it is evidence about that meeting and nothing wider — not a general matchup, not a rematch, and not a ranking of its own.

The ladder above it is argued from everything either of them has been shown doing; this page is argued from one citation.

Where the two disagree, the disagreement is the point, and it stays visible rather than being resolved by whichever of them happens to be on this page.