Board Thread:Questions and Answers/@comment-33539866-20171217091212/@comment-32271305-20171217134028

There are hourglasses that you can use to reverse a character from TUR to UR. They only cost 30 gems, and they allow you to open paths in the potential system without worrying about any of that stuff.

Not dokkan awakening any card until it has all paths open doesn't make sense to me. That could take forever, and you'd only end up holding your team back for the longest time, since most cards get a lot better after dokkan awakening.