caliph never store iron wheat and flour,,,
also u pleace too many houses n siege engines,,,
for all that thing i think u just over excited,,,
but good work, nice model,,,
lets me give u a hand,,,
~3 siege engines for every kind,,,
~15-18 bad thing,,,
~keep ur eyes on build timming,,,
[Edited on 09/12/14 @ 10:42 PM]
Did you actually test that?
If i remember correctly, farms placed in the AIV editor will only be placed ingame by the AI if in exactly that spot there is oasis available, but not try to place them elsewhere.
Judging from the picture: Impressive-looking fortress design, although (unless there's some mighty and cleverly placed pitch there) might be weak at the sides. Suffers from various problems already mentioned above, and in short is quite unusable for the caliph actually.
BUT: You might try to use this castle for Saladin instead or, with some adjustments, for the Wolf or some other strong opponents with a big amount of economic buildings.