Does the difficulty for mods continue to go up, or does it cap somewhere? Is making that last roll for a fully upgraded Ilum crystal PPPPPPPPPP?
According to Sam Stewart on the most recent O66 podcast, you'd actually upgrade the difficulty for every difficulty die past Formidable (5 purple). So to get that 7th modification on your Ilum crystal, you'd be rolling against a Formidable with four upgrades, for a pool of 4 red and 1 purple. Better not screw it up
Thank the maker we finally have an answer for this.