Flag proposals:

Not sure if the upside-down cross should rather be distinguished from the upside-down crescent, but I'm open to any suggestions.

I. Replace the green and black in the first flag.

II. Try to add “ إبليس‎ ” to the second flag (if you are not good with calligraphy you can leave it).

III. Possible coat of arms basis.

I reversed the colours of the top flag, but while I tried, even Kufic is a bit too much to master late in the evening. (I don't even attempt any more complex scripts.)

You can copy paste or abandon it. The first flag is quite good.

I added an “akbar” on the other side to create at least some visual balance (and made the green rectangle fit better).

Am I blind?

Nope! I can see.