If you're solo top against a ranged AD carry such as Ashe, you want to constantly harass her. Always use your E to drag her within range. Following after E, use W so she won't get out of your range. Now, if you you follow the rune and mastery page as seen above, your attack and crit chance will go up. So, as a final skill, use your Q to do some major damage. After that, just do some basic attacks. As you continue doing this until lv 6, your'e ready to kill. Follow the sequence above but this time use your Q first if he's within range. After, use your W and then basic attacks. When she tries to run, use your E and finally R finishing her off.