The most successful build for Gragas Mid consists of Luden's Echo, Shadowflame, and Rabadon's Deathcap, which has a 63.6% win rate. For boots, you should almost always choose Sorcerer's Shoes as they are picked in 77.7% of games. Your starting items should be Doran's Ring and two Health Potions to sustain through the early laning phase.