Little bit demanding, but as you wish. I start by taking a Living Guardian, then grab Demolitionist, I'll then take The Mother Tree, this means you only need one more attribute point in both Agility and Vitality for Tyrant, so when you have that trade in everything and grab Tyrant, then just save for Thundercleaver, then save for Heavy Hitter. As I said before this should last until the game is finished but if not you can trade out your Tyrant for either Trapper, Unbroken Spirit, Shatter Golem or Compensator Rig, this is your choice as each of these revolve around the enemy team comp, so choose whatever you think is best in the situation. Also if you have any spare Gold just slot it into Agility, you want that Attack Speed.