Board Thread:Game Discussions/@comment-24149689-20140109105820/@comment-24424436-20140122214458

You can beat the boss as many times as you want before you start crafting. Just make sure you beat the epic boss 43 times before it goes away or 60 times if you want 2 plus versions of the armor. Also you can craft the armor any time after the event if you have enough materials needed to craft the armor.