PSA: Each player can only have 3 stealth wards and 1 control ward out at once.
You know what that means?
It means that the support, while they DO ward more than any other role, CAN'T keep vision of the entire map.
Even if we are at ward cap, the map is still going to be dark unless you provide some vision yourself.
So, stop bitching for one minute and buy a goddamn 

Cough
: Infinite wards. Best used in own jungle. Best used on those bushes in the sidelane noone ever goes in once laning phase is over. Good to keep track of who is pushing what where.
when i play a tank or
if playing mage and i don't think vision is good enough