I'm currently using AB Topbonus as my only OW card since it's also valid for EY which I'm flying from time to time. Maybe someone could confirm that it's not much worse than other OW programmes when it comes to collecting status miles?
I'm DUS based, with ~35k flights in medium-priced Eco, mostly within Europe or via AUH to Asia. With Topbonus I might at least make it to OW ruby.