User blog comment:TheHellDoIPutHere/Supports and You/@comment-3358335-20130718174022/@comment-3358335-20130718193310

The two roles that are in the best position for map awareness (and ward placement) are the jungle and the support and most of the pings should come from both of them. Top, mid, and adc can narrow focus into just their fight and even the best of players can find themselves laser focusing on an objective and not see the danger coming until it is too late. The jungle has time to look at the mini map while travelling between camps and lanes. And the support just needs to have an awareness of what is going on between pokes and exchanges in lane while the adc is focusing on last hits.