So you dont know how to rush AI faction that has some units defending...

I as Turks waited a bit for Armenia to lose strongest units taking Karaman, Selukleia and Vahka, than i killed them with bare 4 quapuluks. Than same with Most of ERE cities leaving him with Trebz, Constantinopole, Nicea(?) and Cyprus.

I made some catapults and had enough armies to lay siege on Nicea and Constantinopole, capturing their sets without garisson script kicking in.