Erudite

Erudites have focused on how to defend their homes and allies via aetheric barriers and healing to provide much needed solace during the heat of battle.
They approach battle as a game of chess, minimizing loss and damage so that their allies can work as efficiently. Having an Erudite at your back is to know true safety in the face of danger.

Features

Guardian Shard

Beginning at the 2nd level, as a bonus action you can order any number of your Nouliths to guard an allies within its flight range. As a bonus action you may remove any number of Nouliths from allies.
  While equipped to an ally, you may cast touch spells through the Noulith, as though you were standing beside the creature.
  Additionally, as a reaction to the equipped creature being targeted by an attack, you may use your reaction to create a temporary barrier, increasing the creature's AC by a number equal to your Intelligence modifier. You may do this a number of times equal to your proficiency bonus. You must complete a long rest before you can use Guardian Shard again.
 

Aether Wall

Beginning at the 6th level, as an action, you can link two Nouliths within a 10ft. radius of each other. This link creates a wall of force between them that is 10ft. wide and 10ft. tall. A creature that attempts to push through the wall must make a Strength (Athletics) check contested by your spell save DC. This wall is translucent allowing creatures to see through it without difficulty. The aether wall provides three-quarters cover when calculating ranged attacks and spells that pass through the wall.
  It is possible to link multiple nouliths together to enclose a creature. When you use your action to create a wall between two nouliths, if there is a third noulith within a 10ft. radius circle of either end of the wall, you may connect them in the same way. The additional wall may not pass through the creature. A creature who is enclosed within an Aether Wall has disadvantage on their Strength (Athletics) check to push through the barrier.
  These walls are strong enough to support the weight of someone standing on them, and may provide footholds made of aether when aligned horizontally.
  As a bonus action, you may disassemble any number of Aether Walls created by you.
 

Aetheric Armour

Beginning at the 10th level, when you protect a creature with your Guardian Shard feature, they gain temporary hit points equal to your Intelligence modifier.
 

Overcharge: Impenetrable

Beginning at the 14th level, as an action, you can amplify your protective ward for a creature equipped with a Noulith within 30ft. of you. You supercharge the Noulith, coating the creature in an aetheric shell. For a number of rounds equal to your Intelligence modifier, the creature gains a damage threshold equal to 5 + your Intelligence modifier + your proficiency bonus. When the creature is damaged, if the damage does not meet or exceed the damage threshold they do not take any damage from the attack.
  You can hyper focus a creature's armour once. You must complete a long rest before you can use Impenetrable again.