What spells does your tinker have in its original form?
In my MOBA map I got a Tinker (the Mechanic) with these abilities:
Passive: Demolish: The Mechanic's basic attacks deal additional damage to buildings.
Ability1: Cluster Rockets: Launch a barrage of rockets at the target location, dealing (...) damage and slowing the targets.
Ability2: Slam: The Mechanic slams the ground dealing damage and rooting the targets. (100% slow)
Ability3: Bombard: Launches a long-ranged missile at the target location, dealing (...) damage.
Ability4: Robo-Tank: The Mechanic transforms into a tank increasing damage, armor and health, but removing mana regeneration.
I think that you dont want the passive, that you already have cluster rockets and that you use robo-tank to transform.
The slam is pretty simple. You know how to make that.
The bombard ability is an area of effect ability with massive range. A rocket is fired with a high arc to that location and you gain vision of the target location until the rocket hits the ground.
Here are 3 other abilities that were possible on the tinker but I used those on others and I didn't like multiple abilities that are perfectly the same.
Passive: Cleaving Attack: The Tinker strikes with such force that he damages multiple enemies with his attack. (Used as a hero ability though.)
Ability: Land mine: The Tinker places a land mine that will explode when an enemy unit comes close. (The land mines dont expire automatically.)
Passive: Devotion Aura: Increases the armor of nearby allied units.
Hope that you got some ideas now
Next to that... You want us to send you a private message when we want to help you with your map but you disable private messages?
Sure bro.