I will do it with pleasure

Gremory cannot have as a trait devour since it is the master of illusions. https://en.m.wikipedia.org/wiki/Gemory

It is clearly specified that the biblical god is the 4th most powerful being (after the three dragons). in dxd it is specified that the gods gain power through faith. When Christianity spread around the world it took away the faith from the previous gods. (Not deverted from an invasion) but they just turned a blind eye This means that Christianity was the most powerful religion. At the level that even during the civil war no other faction attacked them. The invaded therefore must necessarily be much weaker as no nation would allow itself to be invaded by letting their national power diminish by giving it to another if even a minimal chance of victory is possible. The 4 new satans are no stronger than the original ones when it says it in the anime / manga it means the descendants of the original 4, plus in the anime Christianity is weak because the angels have lost god and many of them, the same for the fallen as they eventually retire due to heavy losses and the underworld has lost half of the 72 pillars. for example, samael has a poison of such a level that it is also possible to weaken ophis and great red I do not deny that Hinduism may be very strong perhaps the second and the Greeks the third (but of the Greeks the strongest is ade the lord of the underworld as he obtains faith through the dead) Ps. Sun wukong very famous in chinese mythology is the avant-garde of indra in dxd verse.