I'm well aware that we're just using an avatar of Nyarlathotep here, but I found a quote that would massively boost the true forms of the Outer Gods in power:
"Randolph Carter's advance through that Cyclopean bulk of abnormal masonry was like a dizzy precipitation through the measureless gulfs between the stars. From a great distance he felt triumphant, godlike surges of deadly sweetness, and after that the rustling of great wings, and impressions of sound like the chirpings and murmurings of objects unknown on earth or in the solar system. **Glancing backward, he saw not one gate alone, but a multiplicity of gates, at some of which clamoured Forms he strove not to remember.**"
As you can see in the bold section, the Cthulhu Mythos' cosmology doesn't just jump from "First Gate" to "Ultimate Gate". In fact, there is possibly an infinitude of Gates before the Ultimate Gate.
But again, it doesn't quite matter here as an avatar is being used for this fight.