Talk:Infinity Edge/@comment-4743916-20120411054933

IE gives 80 atk AND amplifies the total damage your AD carry does by 250%*25%.

(Total AD+80)(137.5%) from just IE's critical damage alone compared to (Total AD+100)

This more than outdamages the extra 20 ATK a fully stacked BT gives. The only drawback is no sustain but in the end IE gives better damage flat out than BT even when fully stacked.