That suck for rate up, if magic jewels rate up ever come close to 15x star coin rate up, even with 5x for magic jewels, we should have around 5*181/(66+4)~13 Light Nike, assuming the rate of each SSR hime is equal, I'll also check the rate of each hime later.
"Available by Star Coins Gacha(15 times Rate UP until 20:00 1/8) and Magic Jewel Gacha(Until 20:00 1/6)"