Talk:Heracles/@comment-77.181.100.161-20170801161215/@comment-173.239.230.100-20171023222147

You get more from chapters and events. I'm guessing you're on the NA server. In which case, Halloween 2015 (2017 for you guys) will give you +1 grail. You can get more, just be patient. I think on JP, we got around 22 in total so far.

My recommendation is to think about it this way: you have 5 slots in your party (not counting the support). Grail someone you always use in your party. For me, that is Cu Chulainn Alter and Scathach.

Grailing from 80 - 90: 2 grails.

Grailing from 90 - 100: 5 grails.

Grailing Herc is worthwhile because as many have already noted, he's definitely one of the absolute best Berserkers in the game, especially at 4-stars. He has survivability, damage and he is a great anchor at the end of your party if needed. Grailing him to 90 only takes 2 grails and he'll be super useful throughout your FGO account's lifespan even after you get new Berserkers. He's still one of the best.