Call Jihad 10 times in 1 turn.

[Slicendice]

I mean that if your Imam calls a Jihad, then a general joins the jihad, reaches the target, and captures it in 1 turn and ends the Jihad then the Imam can call another Jihad that same turn! The Imam can call repeated Jihads in a single turn or over multiple turns so long as the Jihad is completed that same turn. If the Jihad lasts more than 1 turn and is then completed then you will have to wait 10 turns for the next one to be available.

I've never heard of joining and quitting a Crusade for chivalry exploit. However, I imagine if you do that you will be taking a huge penalty on Guilds like St. Johns, and Templars, etc.

Plus you have the chance to pick up Ancillaries like Holy Relics and such when completing a Jihad/Crusade and your method doesn't offer that.