Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This is my recent Ashe build that I have been using. It has done me very well earning plentiful assists and kill (Assists really helped the team get ahead). The mana regen runes and points in utility are ESSENTIAL to play Ashe. ArP for damage of course, movement - given, ability CD, for faster crystal arrows and AoE spam. The biggest asset for Ashe is being able to fire arrows across the map and still have mana to fire volleys in your own lane to hold your own.