A free wellfare servant, plenty of salt, and a bunch of stuff to grind. Let's go!
Quick and easy guide to help you min/max your grinding, there's gonna be a lot!
So you've done your re-roll and you're satisfied with what you got, now let's see how you can min/max out of the gate!
Re-rolling is a straight forward process in FGO, but you'll need time and a good WiFi connection if you're set on chasing those SSR characters.