Youmuu's Ghostblade - What is its role?
Youmuu's Ghostblade is a kind of weird item the more that I look at it. It builds out of an item that encourages early aggression
and an item that encourages a farm lane
. In addition, half of the stats that it gives do not benefit AD carries while the other half do not benefit AD assassins. For instance, AD assassins typically do not make use of attack speed or crit chance in their assassination patterns as they tend to use abilities that scale off of flat AD during their all-ins and do not auto attack champions repeatedly. Likewise, many ADCs do not benefit from having 20% movespeed unless used in conjunction with other movement speed abilities (Graves or Lucian). Also, many ADCs do not have high enough early game base damage numbers to make use of the 20 armor penetration that the item gives. Once late game comes around, many champions naturally have 80 base armor from level scaling, making the flat armor penetration not as useful. It also does not give enough crit chance or attack damage to make it a truly powerful buy for ADCs.
Since Brutalizer only builds into Youmuu's Ghostblade now, perhaps you could create two items that build out of Brutalizer. One that benefits ADCs and another that benefits AD assassins.