PINK WARDS ARE USELESS?
We need Pink wards that are useful enough. 
Why?
Placing pink wards is very useful to prevent ganks and spot invisible units/champs, but,The Pink wards have a huge weakness, they are visible and if the enemy team spot pink wards they will just destroy them easly.
We can't spot invisible units with another items without sacrificing one slot in our inventory everytime we need one, and if we place a pink ward in a fight to spot those inivisible units it's immediatly broken too.
We need an efficient and effective item that can be useful to spot invisible units.
I suggest The pink ward Needs to change to:
---- Invisible Pink ward that expires in "x" time (100g). (spoted by
)
---- Or We need this item back
so we can place it every time we need.
If we can't spot this champions in time or we run out of pink wards/slots, This guys can be really overpowered and/or annoying

This item is not very effective against champions above. 
Thanks for reading.