Need Help Iding Odd 4th Century Roman From Siscia Mint

I have to rely on you and the coin being in-hand. I could swear I see FL at the beginning of the obverse legend, but hey, you have the coin there. The possible RIC attributions are outlined above and without any further evidence, I think we have taken this as far as we can.

It doesn't really look like it to me from the picture, but since you have it in hand, does it look like the obverse can be cleaned any further?

Ah ok. My only suggestion at this point would be to come back to it at some point in the future, give your eyes and mind a rest from it. If the first time fails to identify it, you may discover something else about the coin a second time around that will help identify it. A lot of unidentified coins I had I managed on later tries to see other things about them that helped me attribute them, a letter that looked like a D the first time around may look like an O when you go and look at it again, that kind of thing.