This is my guide/ my own build to clockwerk goblin. i like playing him as an initiator late game and ganker early/mid game, the item progression i like is to build a medallion blink and arcanes early, for good mana, the blink because you can initate a gank without needing hookshot allowing you to gank even more, and medallion to make them easier to kill. with the medallion you can also take an early rosh for your carry.