"I would start with the destruction of every Christian kingdom south of the Pyrenees. It would a lot harder for the Christians to launch a Reconquista if they have only a Mediterranean coastal strip plus some mountain passes from which to launch it."
I'll go one better. Muslim France. At least for awhile.
Really, in any scenario where Catholic Europe is severely nerfed, Muslim outposts like Andulas will do fine.
Other than that, you need to put Iberia in a similar situation to Anatolia, which is difficult since Anatolia was more vulnerable to Islamicized nomads and obviously got less support from the Christian west. But if you want to do a timeline, you can turn one of the Taifas into the equivalent of the House of Osman.
I'll go one better. Muslim France. At least for awhile.
Really, in any scenario where Catholic Europe is severely nerfed, Muslim outposts like Andulas will do fine.
Other than that, you need to put Iberia in a similar situation to Anatolia, which is difficult since Anatolia was more vulnerable to Islamicized nomads and obviously got less support from the Christian west. But if you want to do a timeline, you can turn one of the Taifas into the equivalent of the House of Osman.