I win a lot using the recommended build during the beginning, then slowly picking up the strategic to form and customized your build to carry the team even further to victory. There's no need for travel boots in mid game..instead go for warhorn. Just my view :) thanks for your contribution

I call it a tank because this build gives you a lot of health, while still dealing large amounts of damage. I added more too, like threats!

I'd say more of:

Boots
Warhorn
Clockwork
Either Frostburn or Shatterglass (depends if the enemy team is rather slippery or not)
Tension Bow (for that extra burst of damage using Truth of the Tooth)
Crucible

Not bad, I would go:
Contraption
Clockwork
Shiversteel
Frostburn/fountain
Situational
Boots

you call this a tank?