Board Thread:Questions and Answers/@comment-66.108.6.230-20150723224840

So I know that at lvl 20 or 25 your swords go through Toku and basically evolve, but I have seen a lot of people say stuff like "I recommend lvl 60+ sword for world 6." What's the point in grinding that far when it seems like stats don't increase anymore past Toku state plus refining? What am I missing here? 