User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-82.160.23.173-20180625200620/@comment-28884330-20180719142211

Your argument falls apart from the getgo because it implies Sirzechs and Ajuka are superior to twice the power of the Heavenly Dragons in their prime. Shiva considered Sirzechs and Ajuka as potential threats, but didn’t consider incomplete Ophis as such. This essentially means that he doesn’t consider them as potential threats based on their current raw combat power, or else you need to think as Sirzechs and Ajuka as superior to 2x Ddraig/Albion-level.

Trihexa’s Core is not as strong as the complete Trihexa, just like it’s separated bodies. And even with that, during its fight with Issei and Sirzechs it was barely fighting back, so it’s not an adequate fight to derive any judgment from. A separated body of Trihexa can destroy an island without a trace in one blow and the Core did nothing even close to that, so logically, the two conclusion to derive from that is that either it didn’t go all out or that it’s even weaker than the separated bodies.