User blog comment:Xilinoc/Ch. 602 - Bane Licking Good/@comment-5592530-20141024092420/@comment-5693502-20141025000148

I still think that Gremmy's claim of being the strongest Sternritter was valid, even though he didn't use his powers very efficiently. His schrift was so OP it's a joke... But I'd go with the idea that Askin was the strongest Sternritter alive at the point of Gremmy's death (and even before that).