Played a christian in the old gods for once, started as count Eudes of Chartres, went as follows, fellow count started a faction to put me as duke of Anjou, I joined, the duke surredered the title after a short war, i then betrothed myself to one of the West Frankish princesses, and then schemed my way to the top, by eventually putting that princess on the throne of france twice, I took aquitaine, and putting that princess on the thrones of Italy and Bavaria, then inheriting it all, forming Francia, and then subjugating the remaining kingdoms was simple...
Keeping the empire together after my death on the other hand.... Strong diplomacy I will require

My brother is on the throne of Italy, and my second son is ruling in Aquitaine, Carolingians rule the rest... for now.