Everyone knows that Ogre magi is capable of 2 things; 1st is that he can do heavy damage with his spells.But the nature of his spells is both defensive and offensive.So all u need is to level up fireblast and ignite full at the very start of the game.Ultimate is also essential you all know that.I recommend you to have at your starting item build soul ringit very useful if you are playing ar.If you play ap or sd or rd (I refer to these modes becuase u spent gold to pick a hero)Then have a sobi mask a wand and mp potion if you are confident that u wont let your enemies at your lane to lower your hp and make you vulnerable.If you are not confident start with sobi mask tango and a mantle or branches.Sobi mask will be useful because you will have to make it Euls Scepter of Divinity.An essential item for supporting during the game.That the one thing you need from recipes the other is guinsho it's the best support and disabling recipe.It simple not complicated got it??Thats all my friends.Ahh and dont forget to buy boots i usually dont buy them early ehehe.The other items except Guinsho and Euls depend on your likes and tastes but bloodstone or linkens or shivas would be just fine after these items.