Board Thread:League of Legends discussion/@comment-24603390-20140317093853/@comment-24603390-20150711110441

Modified the post to take into account the comments above. Clarified the paragraph about abilities with 100% AD ratios. Removed the comment about being dependant on crit chance, (as the efficientcy of Last Whisper is not dependant on this). Adjusted the example for the change in damage of Ashe's Volley.

The efficency of Last Whisper is not directly dependant on attack speed, crit chance, or crit damage, it is dependant on the damage of your physical damaging abilities and their AD ratios if applicable.

Remember that different enemies may have different armor values, use this graph individually for each enemy, or just for the ones you plan on damaging.