Engineer
“Engineers are technical masters. They can assemble a turret that fires a barrage of bullets, dealing damage to enemies. If enemies dare to approach Engineers in a melee fight, they'll either take a wrench to the head or be shot with a revolver at point-blank range. Each successful attack grants Engineers combo points, which empower their later attacks.
The Engineer is a Mercenary Mastery that wields a wrench and revolver.
Abilities
The Engineer's abilities can be seen below:
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, critical damage increases by 50%.
If cast on a turret:
The Engineer remotely buffs a turret. Its next three shots deal 10% more damage (Spell Power).
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%.
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, increasing the turret's 
Attack Speed for 5 seconds and causing it to generate an electric pulse. The pulse deals magic damage and decreases enemy movement speed within a short range from the turret.
Spell Power of their maximum 
Health. For the next 7 seconds, the Engineer generates twice as many combo points.While the ability is active, the Engineer can remotely choose their turrets' targets.
A turret is surrounded by an aura that grants the Engineer bonus 
Armor and resistance.