Couple of thoughts on your Graves guide. Infinity Edge should be your first item, its just stronger than Bloodthirster. After you buy infinity edge, try building youmuus ghostblade instead of static shiv. It gives a great speed boost, which can really help with his short auto attack range. Kind of a snow ball item, the CDR, AD, Armor pen combined with the infinity edge create a very reliable and smooth power spike. If you go to late game, you can sell this item for phantom dancer so you have better DPS, but I wouldn't get static shiv at any point in the game. Also, as a last item I recommend Mercucial Schimilar, Banshe's Veil, or Guardian Angel, but I don't think Frozen Mallet does enough to warrant its purchase.