Rey killed her parents is something that I was definitely thinking about using, but in watching Ascendant I was having trouble figuring out how it would work in practice. We would absolutely need some sort of reveal there, a VFX shot of Rey hitting the ship with lightning like she did in the desert, which is no small task.

Another question that arises from this is how does this affect Ochi’s ship? Is this the same ship that carried her parents away from Jakku, and if so then how is it on Pasanna and not wrecked in the Jakku desert?

As far as I can tell in canon, the ship is named the Bestoon Legacy and Rey’s parents used it when hiding Rey on Jakku, at which point Ochi discovered the ship and Rey’s parents and killed them. He then found some festive beads belonging to her parents which led him to believe that Rey was on Pasanna.

So for the plot to make sense in canon, Rey must damage the ship enough to kill her parents but not enough to destroy the ship itself. Then Ochi could find the ship and the festival beads would lead him to Pasanna.

The big problem with all of this remains the fact that the ship Rey sees is the one on Pasanna, and this doesn’t fit neatly into any story about Rey’s past, even the official one.