The best way to get the limited kamihime without whaling is to plan in advance and save up a few months worth of jewels (and tickets), then spend them all during the rate-up period. If you're asking this question now then you're already screwed. But even if you plan in advance and roll multiple times under optimal conditions, your chance of scoring a specific SSR is still less than 20%. In other words: don't count on getting exactly what you want without spending hundreds or even thousands of dollars.