Still in the 100 years thing, but by now, an enjoyable run. First of all, grab all the counties to the desmene of two Yemeni duchies at start.
- Temples count any of built, so a bit of spread through West Arabia and Ethiopia (Check that not all counties have a temple built). As money is not a difficult matter in that region, actually build a pair of temples is possible.
- The Hindus conversion. Ok, I didn't read until now the trick, so I went the playable way. Hindus is not like other challenges easy to call... you're a female unchasted foreign unbeliever, so a general bad opinion is set. Also, India falls far from Socotra and little diplomatic range is available. Ok, jump across the ocean with a fabricated claim... but... wait, where's my strong claim??!!
For some reason, there's this small sentence a little hidden: "The claims of female Muslims can't be pressed, not even if they are your personal claims."

So... instant change to Nestorian or whatever prayed in Ethiopia, press claim, back to Shia. Phew.
Then, holy war for a nearby zone. For example, Goa. There are landed Hindu characters under control now (counts or baronies). Save the game, and give titles, money, etc, make them happy, and convert. Some interesting work, just to say this challenge... if correctly played.
- Hold all Yemen for a HUNDRED years. This means two counties in Seljuk hands, that is a lot of pain strating from 4K troops against 12+K. Recipe is the usual: Develop, train, and wait until Seljuks make something weak and attack with your camels and mercs. And then... wait. And wait. And wait. Must be a joke of the designer make us wait a hundred years. Of course, we love this game and instead setting the 5-speed button, is a time to form Arabian Empire, enjoy fighting crusades, and "I want to be Caliph instead of the Caliph".