User blog comment:Bobchen/Which lanes do you think are the most difficult?/@comment-11139202-20130621232152

I think roles are mostly rated on required amount of map awareness.

Jungler and support are normally the hardest. Why? They both need a high amount of map awareness and the ability to do a lot with the little gold they can earn.

Mid is generally somewhere in the middle because while they don't need excessive warding or item efficiency, the lane stil lrequires some map awareness for counter ganks and coordination with the jungler.

Top and AD are usually in their own little worlds on the edges of the map. Top is the most isolated lane while AD's focus primarily on farm and harrass. Other than that, they generally don't to roam until a tower is taken or unless the jungler asks them to.