Originally Posted by uncoated
double doran's or a chalice and flask, i never have mana problems
Yea, try damage problems instead.
My personal experience is that if you are harassing with autos, you shouldn't have mana problems in lane, and if you get blue buff, you shouldn't have mana problems in team fights.
My problem with Ahri is that her mana costs are rather stupid for her damage output. My enemy can auto harass me too, AND they get the added benefit of throwing in a couple spells if they don't know how to auto because 70 dmg pre-mitigation doesn't eat 1/3 of their mana bar at level 1.