Attempt to make the arcane archer good.  Prerequisite: Archery fighting style.
This is an Arcane Archer build.  Not being an archer would be counter intuitive. 

This is all still a work in progress.  I welcome any feedback that will help balance the class.  The standard Arcane Archer in the PHB feels like a second hand thought.  I feels more like a normal archer who found a magic bow then it does an arcana wielding archer.  By making it a ranger subclass it gets access to spells that make more sense for an archer while still getting bonuses to using a bow.  I also gave it cantrips that I feel make sense.  Light can be placed on an arrow and used as a flair or maybe shot down a long dark hallway.  Message allows for tactical communication with the party.  An archer should have the best view of the battle field being the one standing in the back, constantly maneuvering to get the best firing positions and to keep track of the targets.  I feel as though the cantrips Light and Message work well with this concept.  Elemental arrows give more damage options then just using Hunter's Mark all of the time and give utility when fighting monsters that may be weak to a specific type of damage.  Mobil Turret plays more into being an archer, balancing out arcane magic with archery skill.  However I feel like the whole thing still needs work.

Elemental Arrows

Starting at 3th level you gain the ability to infuse your shots with elemental energy.  For the next minute while concentrating on the effect you can choose one of the following damage types to add to your arrows: Cold, Fire, Lighting.  Doing so adds 1d6 damage of the chosen type.  The elemental energy does not remain after the shot is expended.  You can activate this ability a number of times equal to your Wisdom modifier (minimum of 1).  You regain all expended uses after a long rest.  The number of dice increases by one at 7, 11, and 15.

Bonus Cantrips

Starting at 3rd level you gain the cantrips Light and Message.

Magic Arrow

Starting at 7th level your arrows count as magical for the purpose of bypassing magical resistance.

Spell Shooter

 

Starting at 7th level when you cast a spell with a range interval other then self you can choose to fire it like an arrow from your bow using the same range interval rules as shooting a normal arrow.  You still use your spell attack modifier if the spell requires a roll to hit.  If the spell does not require a roll to hit such as the Cure Wounds spell then the DM may decide if you need to roll or not and what it needs to be to hit.  The spell still behaves as it would once it reaches it's destination (Example: Cure Wounds would heal the intended target).  Yes... this means you can heal your friends by shooting them in the face.

Piercing Arrows

Starting at 11th level you gain the chance to pierce your target.  If you roll a critical hit on a target you can select a second target provided on is in the path of the arrow.  Make an additional attack roll to hit the second target.  This effect only works once per arrow.

Mobile Turret

Starting at 15th level you have become a master of both mobility and rapid fire attacks.  While you are conscious, you move as though under the effect of the Freedom Of Movement spell.  You can attack three times, instead of twice, whenever you take the Attack action on your turn.  At the start of each turn you get a  +1 to your attack roll for every subsequent shot fired from a different location.  You must move at least 10 feet for each shot and the bonus is lost if you double back.  The bonus is reset to zero at the end of your turn.

[Note]: If you are grappled or restrained while unconscious or incapacitated you do not automatically break free when awoken.  You must make the appropriate skill check or saving throw to escape if it is even possible to escape.