its also good for an extremely tanky team that is getting AD from Atmog's and stacking Armor....
thats when Madreds is better than IE+PD+LW
i very rarely build madreds unless there are at least 3 tanky chrs on the enemy team...and i'll only build it on Vayne or Kog'maw.....and i usually don't build the Madred's until endgame, after i already have IE+PD+LW
so Zerkers, IE, PD, LW, Madreds, BT
who builds atmogs anymore --- QuantumSurvival on US