User blog comment:ClariS/FEEDBACK! Cost Efficiency/@comment-5002283-20130107105134/@comment-5002283-20130107110542

And I'm for using the cheapest low tier item, because for some stats there are many basic items (ad,ap,etc.) which reduces the average and for some stats there is only one basic item (mana,hp/5). which would result in a relative high cost efficiency.

For instance Long Sword 40g/ad, Pickaxe:35g/ad and BF Sword: 34.4g/ad. The average would become 36.5 instead 40. That is a cost efficiency difference of 350g on ad alone for BT.