Board Thread:Questions and Answers/@comment-33119277-20170916222347/@comment-33728484-20170917001014

You could grind the quest 21.1 and hope to find Launch or Pilaf (or both) on the field, in order to raise your rank and get plenty of gems at the same time. Too bad the Quests' Rank EXP is neither doubled or tripled at the moment, but if you want a better team, then why not... and gems are always great.

Another option could be to raise your team cost through the brand new Supreme Kai's Trial missions, although you'd probably be able to raise it just by 6 for now, I'm not sure when they'll be adding new missions.