Board Thread:Help Board/@comment-26922413-20151103195428

What level would you guys suggest is a good level to start farming for these two items? I know that it's gonna be pretty hard and I've never really thought of farming for these spheres at all until recently. Does it require a full 7* team? How difficult will it be and how long does it usually take to craft a single Occult Treasure/ Revelation Book? Will these spheres be a major neccessity or will I be fine without them? What kind of squad setup is recommended?  