Engineer

If cast on an enemy:
The Engineer fires at a target, dealing physical damage (Attack Power). Every combo point increases the damage the ability deals by 10%. At maximum combo points, a critical damage the ability deals is increased by 50%.

If cast on a turret:
The Engineer remotely buffs a turret. Its next three shots deal 10% (Spell Power) more damage.

Each combo point increases the buffed turret's damage by 5% and the number of empowered shots by 1. At maximum combo points, the turret's attack range is also increased.

The Engineer places an automatic turret that deals magic damage (Spell Power) to all enemies in front of it.
If a second turret is nearby, the two will connect, creating an electric beam that reduces enemies' movement speed by 40% and increases allies' movement speed by 30%.
When placed, turrets have a durability level of 2 (out of a maximum of 4).
A turret's durability level decreases over time and when it is damaged by enemies' basic attacks. Each durability level increases the damage the turret deals by 15%.
The turret is destroyed when its durability level reaches 0.

If cast on an enemy:
The Engineer delivers a powerful blow to a target, dealing physical damage (Attack Power) and stunning the target for 2 seconds.

If cast on a turret:
The Engineer hits the turret, causing it to generate an electric pulse.
The pulse deals magic damage and slows enemies within a short range from the turret and increases the turret's attack speed for 5 seconds.

Generates 2 combo points.

The Engineer gains maximum combo points and a shield equal to 20% (Spell Power) from maximum Engineer's health. For the next 7 seconds, the Engineer generates twice as many combo points.
While the ability is active, the Engineer can choose turret's targets remotely.

A turret's durability level increases by 1 when the Engineer basic attacks it.

A turret is surrounded by an aura that grants the Engineer bonus armor and resistance.

Basic attack generates a combo point.