What to do next? Need opinions and suggestions

[Caliph Ramy]

First post Hi Everyone o/

So after I had done some research and watched some tutorials I bought CK2 like 3 months ago. I started the game at year 1066 as the Shi'a Caliph with the Kingdom of Egypt and some counties in the De Jure Kingdom of Arabia. Of course, I had a hard time managing my realm in the beginning as it was too big for a beginner (Silly me) but I eventually managed to get the hang of things. 134 Years and pools of blood later, My character is the Emperor of Egypt. I have control over Kingdom of Egypt, Kingdom of Arabia, De Jure Kingdom of Jerusalem (I can't create the kingdom title coz I'm a Muslim), Kingdom of Mesopotamia, Kingdom of Syria, Kingdom of Persia, and Kingdom of Africa -- all through conquests. My current threat level is like 80%. I have given vice-royalties of all my kingdoms except for the kingdom of Egypt. I have fairly good relationships with my vassals. My religion's moral authority is 100. Long story short, I think I'm doing pretty good (Tell me if otherwise ).

Laws: http://i.imgur.com/657tW8l.png
Military: http://i.imgur.com/Nvs1l7Z.png

Now I have some questions for you guys:

1. What do you think I should be doing in the next 100 years?
2. What should I be doing while I wait for my threat level to diminish? Coz I can't declare more wars or expand now (too many defensive pacts against me).
3. I always try not to get more than 2 heirs and I don't grant them any titles, all my vassals are not of my family and I'm not worried because I'm strong enough to keep them in line. Is that good or should I expand my family and grant them everything?
4. In the last 60 years or so I've been building holdings and improving buildings in my Kingdom only. Should I start improving holdings in other kingdoms I control? What holdings should I improve first? What's the best strategy for this?
5. Any suggestions irrelevant to my questions are very welcomed.

Sorry for the long post haha

 

[Kazanov]

1. Forget Islam, restore Zoroastrism.

Or

Embrace Jihad, conquer Rome

2.- Prepare for war, build up your economy.

3.- The only thing i dont like about playing with muslim dinasties is that...thing, decadence kills all the fun.
4.- Improve only your core holdings, those that you are sure that you will never lose.
5.- Do you like turtles?, they are cool.

 

[Caliph Ramy]

1. Forget Islam, restore Zoroastrism.

Or

Embrace Jihad, conquer Rome

2.- Prepare for war, build up your economy.

3.- The only thing i dont like about playing with muslim dinasties is that...thing, decadence kills all the fun.
4.- Improve only your core holdings, those that you are sure that you will never lose.
5.- Do you like turtles?, they are cool.

Turtles, that made me giggle haha. Thanks so much for your answers