So my strategy as the Karen, has been to rush in and attack the people the Sassinids are attacking. This takes a lot of precision to get it to work right. Usually I win a battle in the nearest provice, assault their bases and then spread my forces out. If you pay attention you get the bonus of the Sassinids helping you in castle assaults. Usually I borrow money from the Jews. Bonus in this scenario is if Khiva or another weak arab lord rushes to help Tarbistan. Win a couple battles against them and then you get two to three more provinces. This also usually slows the sassinids down.
After this it is usually a matter of luck and timing. Wait until Khiva goes to war with one of its neighbors or suffers some kind of internal revolt. The best revolts are the Zoroastrian ones, as they provide you with an ally after the war.
Graudally expand your empire, going for the kingdom of Khiva. One of the most valuable strategies is borrowing money from the Jews to pay for mercenaries in a defensive war, winning the war to get money, and then paying it back. Also, make sure you never border the Abbasids. Bordering them is trouble.
I am doing this right now in Ironman, so I will see how it goes.
After this it is usually a matter of luck and timing. Wait until Khiva goes to war with one of its neighbors or suffers some kind of internal revolt. The best revolts are the Zoroastrian ones, as they provide you with an ally after the war.
Graudally expand your empire, going for the kingdom of Khiva. One of the most valuable strategies is borrowing money from the Jews to pay for mercenaries in a defensive war, winning the war to get money, and then paying it back. Also, make sure you never border the Abbasids. Bordering them is trouble.
I am doing this right now in Ironman, so I will see how it goes.