I start with Doran's Ring. It is helpfull for the start because it has mana regen,heath and ability.Second item i get Sorcerer's Shoes.I like then when i have a tank for enemy.You can get Ionias shoes if u want cooldown reducing.Third item i get rod of ages.Many players says to me "gragas u are the tank".So i get rod of ages because it gives hp,mp,ap and u get more and more health,mana,ap.Forth item i get rylai's Crystal Scepter.It give hp and it's good with gragas and ap too + u have chance to slow the enemy.Fifth i get Will of the ancient.It gives ap sv and it give to the other players too.Rabadon's Deathcap ofcourse because gragas needs ap and finally i sell doran's ring and i get Archangel's staff because it give mana and it give ton of ap.

Runes i get Magic pene Health and Ap.MP helps only when u have tank or someone will get mr so if u want get health or ap.I get Ap sure because gragas wants ap and finally health because health helps gragas to dont be defeated easily.

Gragas is very fat so he is a little slow.I get flash to escape and ignite.Godd for gragas is clarity and teleport too.Teleport helps him to go faster to and focus with a another player.Gragas wants many mana so u can get clarity it help him

Please vote my guide because its my first one.If i see that i have many votes i will create more guides.Still toon...