Nonengine can be tweaked; the Rose Dragon engine doesn't cost much of any points.
However, due to the ghost girls being Lv3 tuners, cutting them for different handtraps/boardbreakers could compromise the viability of the Psychic Trackers, as they become 2-card combos only with them on board if you don't draw a one-card-combo starter.
Running the Amritara/Reframing package just to have an out to Dark Ruler.
Running the Diabolantis to make full combo at least possible with Circular (IE drawing White Rose, Vengeful Witch, or Spore with Circular)
Rose Dragons needs more starters, so Circular will have to do.