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
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.
The victim · Abeloth · off the scale
The Mother — Fate of the Jedi novels
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.
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.