Either the mods are broken, not working properly or the percentage is SO LOW it defaults to being useless. I saw skarrow's video of a small and limited data collection about this issue and it stands to question; why even have a mod that isn't effective? Make the ghost mod attunement guarantee the archetype or at the very least bump that percentage of likelihood up to a %75. The game is grindy and rng enough as it is currently with the doing away with patterns and crafting (terrible decision, by the way) and this just adds a layer of frustration where the time commitment to play doesn't feel fair.