You get the ghost as well with 3 resets. Put me off gambit since season 4 though, grinding for ship,sparrow, malfeasance and ghost.
The ghost is awarded for getting three resets total. That’s how I recently got Dredgen.
It was 3 in a season back in season 4 when I got the ghost. Couldn't stomach playing it all season 5, then got dredgen this season, only needed 1 invader team kill since season 4 but hated gambit so much, plus titles are pretty bullshit to be honest. Just something bungo put in to try keep ppl playing.