I mean, jades death was rigged by aranea, as was vriskas in a way.

Not by aranea but by a weird angry stabby man with a rocket powered ass

It’s what I’m saying though- Was it? What could they have done to the clock that made any difference on the Judgement? Vriska was slain by Terezi because her actions were going to lead to the death of the rest of the Trolls, which is definitely a Just Death. Jade’s was a corrupted evil slain for a good cause- Even if said cause had questionable means, it fits to a T to Scratch’s definition of Just Deaths. What could luck do to influence the textbook definition of a Just Death? What could lightly knocking the Clock do to a nefarious Troll slain be someone protecting her Friends?