There is a lot of mesh between the female Eye goddesses. They are fluid, moving in and out of their forms as if liquid was poured from one glass to another. It is why their research can be so confusing and brain bending. However they cycle through only a set number of names. They always circle back into those, not over reaching into others. It is the same for the potential male Eye gods. Once I began drawing out the connections you can tell they only cycle through a certain number of names before twining back.
Below is 100% my own opinions.
After I wrote out the tiers and listings I felt less driven to research. It seems that I get a bit of a respite. I was inspired to divine a few things. Some personal, some not. Through the divination I found that the Tier 1 gods are (read, are closest to being) eyes. These are Khnum, Khnum-Ra, Sobek, Yinepu, Heru-wer, and Amun. As they are directly connected to Shu.
The Tier 2 gods are hit or miss. There are a couple and there are not. More research is required and probably more divination. Its one big adventure. But it is most fun.
There are some holidays coming up for these Eye gods that I hope to celebrate with them. Maybe do some more research in their honor. Happy hunting.