Board Thread:Questions and Answers/@comment-33760197-20171127224747/@comment-32271305-20171128011410

Use them on the main hitter of the team you use the most. Just keep in mind that SR AGL Syn Shenron and SR AGL Janemba can be Dokkan awakened and Z-awakened into UR AGL Omega Shenron and UR AGL Super Janemba, which means that you can use them instead of Elder Kais, since they share the same name with PHY (and STR) Omega Shenron and STR (and INT) Super Janemba.

The same goes for PHY Kid Buu, there's an SR STR Super Buu that dokkan awakens into STR Kid Buu. However, PHY Kid Buu is not a hard hitter, he's just a support unit (he gives more ATK and DEF to the team), so he's not really worth it.