Talk:Nasus/@comment-24309189-20140907104553/@comment-6000413-20141005225647

Some extra damage can be nice. Defenses are only as useful as you or your teammates can deal damage while being attacked. Atma gives you crit and a nice 60 AD with ulti, warmog and trinity. End game you get around 4000 hp, 250 armor, 40% crit, 240 AD and 2 items that give MS boots, very useful to deal damage. With respect to a tank build this offers penetration, AS, and on Q you get enxtra 355 damage without crit and extra 595 + stolen AD damage (40% chance). If with ulti you stole 105 AD, reasonable after 5-6 seconds you would deal 700 extra damage wrt a normal Q.

Normal case:

Q with 400 stacks and 105 AD from ulti, Q full tank deals 750 damage (with some masteries). If enemy has around 100 armor that's around 470 damage (hitting E)

With crit build that's an average 750+487 = 1237 damage. With same armor (but more pen) you deal 883 damage. Difference is 413 true damage, not bad. This also gives you an extra 83 HP from lifesteal, helping your tankyness.

Anyway, I woudl go that way only if I'm facing a near-pure AD team, since I forego the MR items to get atma. And I love spirit visage on Nasus...