Ashe is a great carry hero for almost any team and used quite often in high competition play. Some quick things to metion what Ashe is for and what you should be using her for.
- Solo laning
- Laning with a partner
- Staying at good distance always
- Using arrow for across the map ganks or team fights
- Ashe is not meant to take on multiple heroes so play her wisely
- Don't expect 20 kills and 0 assists. This character will give more assists then kills(usually).

Note: Almost every match will become situational for Ashe's summoner abilities, item sequence, and ability sequence. I just provided you with the core part of the build.

Ghost and Flash are both preferred summoner abilities.

They are preferred over ignite and exhaust because ashe will require more ways of chasing/escaping being how squishy she is. An alternative for flash or ghost would be teleport used for serious team matches. The Rest of the summoner abilities are not preferred.

Very good AD ranged hero for ranked matches. She is a very common hero so don't always expect to have her if you are last pick. She can easily solo a lane and get a kill or two to start out leveling her opponent.