Sorry folks, have to jump in on this and say, WTF???
IonDragonX and Ruka Urushibara, you both are wasting the potential of Atma's.
Ion, you have only 1 item that gives health, not counting the Trinity Force as the amount is minor, thus making your Atma's inexcusably inefficient.
Ruka, your build literally only has 1 item that gives bonus health, again, wasting the Atma's potential.
My build is as follows:
Ionian Boots of Lucidity.
This build gives me 2420 bonus health, which, with Garen's Base health at level 18 of 2183, equals a total of 69 damage from Atma's.
Ruka gets 300/350 bonus health from items, meaning that Atma's only gives 37.25/38 damage, less than a B.F.Sword for more than double the cost.
Ion gets 700 bonus health, for a total of 43.25 damage from Atma's, a mere 1.75 less than a B.F.Sword, again, for more than double the cost.
If you get Atma's, please make it worthwhile?