User blog comment:B214/High School DxD EX/@comment-201.53.24.131-20160110173515/@comment-27232228-20160112032825

Zeus alone is not capable of defeating Typhon. As B214 quoted, the DxD incarnation takes the whole Olympian pantheon just to subdue him down, not counting his wife, Echidna, who guards his prison in Mount Etna (since possibly the Olympians made a deal with her in this incarnation). This is more true in some of the classical texts, in that the Greek Chief God needed help from any Gods he met during their fight, with him hitting the final blow to imprison him (do note that, during Azazel's negotiation with him, Zeus has some doubt that Azazel can put the King of Monsters to good use and went to a long discussion).