Nubia and the Amazons #4 shows Nubia cutting off a manticores tail with one swing of a sword, shield bashing it through a building, punching it into another wall, then doing a german suplex on said manticore. Also it was roughly 2-3 times the size of a lion.
Still have not seen a limit to how Nubia or the average Amazon is in terms of strength compared to Diana, but its still feasible