User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-78.48.6.54-20190113221154/@comment-10330822-20190119005525

I think you are missing the point. The Infinity Power and Ophis are one and the same, she is the source of it. Meaning when Issei is using the Infinity Power, he is using Ophis's power. That is why Ophis can regulated his DxD G form into a Pseudo DxD form, because she has dominion over the power.

What Ajuka was saying was that even if Issei was physically fit to use the power, Ophis being split into two beings causes her power to be more unstable. So, it does have a direct effect on Issei's performace.

The issue with him being able to use the power is a different issue all together, but what Ajuka is saying, is that the task would be easier if Ophis was one being.

The solution to Issei's problem is being solved gradually as he gets strong, as Ophis's Dragon God Aura is slowly adapting and changing Issei's soul into that of a Dragon God. Meaning Issei is increasing his adaptability with Ophis and the DxD G form.

So, in short, two things need to happen for Issei to master the DxD G form and probably unlock AxA, Ophis's power needs to stabilize their through cooperation with Lilith or a full merger, and Issei needs to fully adapt to the Infinity Power, which will mean his soul will turn into a Dragon God's.