Judicator's spray with Battle and the archon actually get up to pow 16
The victor is not bad, but the 1 spd on the judicator makes a big difference and the judicator just does more damage at range than the victor, the only thing where the victor is better is range, but since the judicator can threat beyond zones from turn two forward, it's still a tough sell on the victor over the judicator. Running 14 on the first turn to be able to keep up with the rest of the list is actually pretty big for the judicator, having jacks lagging behind the reste of the army is pretty bad, and also probably one of the reason the judictor is so popular in this theme.
Right you are on the sprays!
And with correct positioning of some jamming units, Judicator is oppressive that far up the Board. Sure they can send other heavies after it, but you're going to be dealing with the archons and weapon master solos (while getting sprayed) before you can take it down.