A long while. It can take up to 8 weeks after clearing all the savage before you are BiS (Bests equipments in slots).
So basically, you are safe until you have all the tomestone gear which can take 14 weeks if you aim for a full tomestone gear. But if you are doing EX content, you can skip the crafted weapon. EX isn't that hard but if you're playing casual you'll definitely need some practice.