dex +4 to hit, dc 14

1/day: Steam vent
Casting Time: 1 action
Range: Self (5-foot cube)
Components: S
Duration: Instantaneous
You cause a blast of superheated steam to form in an area filling a 5-foot cube in front of you. The steam scalds and burns each creature within the area, forcing them to make a Dexterity saving throw. On a failed save, a creature takes 4d6 fire damage and must succeed an additional Constitution saving throw or gain one level of exhaustion, as the steam burn causes damage to internal organs. This level of exhaustion is removed once the creature has any amount of hit points restored.   On a successful Dexterity saving throw, a creature takes half as much fire damage and doesn't have to make the Constitution save.

Nimble Escape. The goblin can take the Disengage or Hide action as a bonus action on each of its turns.
overdrive. the goblin overcharges their prosthetics to hit things harder, gaining advantage on Strength checks and Strength saving throws, and a plus 2 to strength(flat). this also makes the goblin very easy to track gaining a -4 to stealth.