User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-31.11.130.118-20171221210546/@comment-29963364-20171222080223

It's true that we haven't actually seen Tobio do anything super impressive, other than wiping out several Mass-Produced Evil Dragons (Grendel & Ladon types) and Fake Scale-Mails on his own.

However, Vali did say that Tobio was someone who "forced Vali to use Juggernaut Drive." So that at least puts him close (I emphasize "close") to Heavenly Dragon-Class (or at least Mid/High God-Class).