As many of you guys know, the Arabs are a top civilization in this game because of there flexibility to go for economic/domination victory. Fast catapults can make the difference in no time, also the extra damage bonus for cavalry make the Arabs a terrible adversary. Arabs receive mathematics for free in the Medieval era, so if you looking for a fast strike of one of you neighbors, be ready to have an army of archers, to protect you catapults and also another army of legion/cavalry for attacking. As soon as you have you first army of catapults move forward, is very tough to stop an attack like this that fast. I know there are some civilization with defense bonus but anyway a catapult is a catapult. Probably a good path for a fast attack will be Horse riding, for cavalry support, bronze working and also writing, so you can send some spies also to disrupt fortifications. Even if you do not go for a fast attack those techs allow you to get the colossus and also you are 2 steps closer to get codes of law so you can start working in you Megacity. Also use you caravans as much as you can, because the Arabs receive 50% gold bonus with caravans. Think about it, if you want, you can switch you cities to generate science and the caravan still can give you a lot of gold. Is a nice civilization who let you go everywhere and with an strong Medieval age, so take advantage of that.