If you're around 100kcs and you want to get the 5B from job#80, I can tell you what I've experienced. ) When you complete job#75, proceed to job#80. Probably the description says "Extremely Difficult". Hit 5 times then regen for 15 minutes. I got 2% every 15 minutes, so 8-10% every hour since jobbing deals with probabilities. That's it. And oh, I love Immortals. ★