Gnomish Inventor:
Emplace Turret: Sets a automatic gnomish gattling turret on the ground that would last for <insert duration>, each turret will deal <insert damage dealt>. It will maim crossing units with rapid bullets, for aslong as it takes hit, it will be slowed.
Rearm: Probably like Tinker's DotA level 6 skill.
Repair: professional gnomish engineering repairs everything thing in an instant, heals mechanical unit or building by <insert number>
Seeker Rocket: shoots off a single rocket on a random target, that would slow down at first but once it detected enemy target, it would accelerate dealing damage.
Gyro Swarm - release a full swarm of small gyrocopters that will shoot all hostile targets on the area, last for <insert duration>