τίς ἐς σὸν κρᾶτ' ἐπύκτευσεν → who hit you with the fist on the head, who has been pummeling your head
(Α ἀμοιβαδὸν) επίρρ. ἀμοιβήαμοιβαία, εναλλάξ, διαδοχικά.