Fist you buy the things that the game say you then you can start doing the lich that helps the passive to have more efect when you finish the first part you have to much mana that is nearly imposible to finished then if you want you can change the secons part to much power of ability of the armor that is better because sona have regen a little and the spirit and warmog's helps that the idea of this is have to much mana tu regen the adc or other players thats why you need the spirit and warmog but you can do what you want thats only my build.So this is my first guide i am happy to help and if this build function you can give a like thangs!.