Talk:Last Whisper/@comment-76.30.146.32-20121218092605/@comment-5266525-20130110134624

^ Mr. 68 never said anything about efficiency or armor penetration at all. He said that Last Whisper and The Black Cleaver break even at 100 armor unless you have some form of flat armor reduction, in which case the latter is more effective due to the extra flat penetration it gives. In the case of Corki with a max rank Gatling Gun:


 * ([100-40]*0.75) - 10 = 35 armor


 * (100*0.65) = 65 armor

Corki's shred means Last Whisper now only ignores more than TBC at 400 armor... which means it's safe to say its never going to be superior outside of the first few hits when TBC's stacks haven't all been applied.