User blog comment:B214/Volume 21 info & spoilers/@comment-99.118.13.217-20160605021006/@comment-27876048-20160605025040

Sizechs and Ajuka are stronger than the dragon kings. Apophis and Azi Dahaka are equal in strength to the Heavenly Dragons so they're stronger or equal in strength to god class beings. Juggernaut Drive is supposed to be the full power of the BG and DD unleashed. DxD mode is superior to JD. Vali's Empiero Juggernaut Overdrive is both stronger and safer than JD. All of the top ten are threats to the planet. Yes, Ophis at full power, GR, Trihexa, and Shiva are the only potential planet busters.