Stance

Root Stance (Requires Machinist Level 11). As an action the Rook Autoturret releases tripod legs into the ground rooting it in place. The turret now automatically fails all Dexterity saves and it's speed becomes 0 ft. The turret must use an action to retract its tripod legs and leave its stance. The Rook Autoturret doubles the proficiency bonus on its attack and damage rolls.
 

Promotion

Muscle Stimulator (Requires Machinist Level 17). As an action, Rook Autoturret releases a field of stimulating energy around itself. Allied creatures within 20ft. of Rook Autoturret deal 2d6 bonus damage when they make a melee or ranged weapon attack for 1d4 rounds.