This is a no-teamplay Guide, dont bother keeping those chums alive, YOU ARE LIFE ITSELF.
You should not engage in any fights before you get Midas and Crystalis, although you can Tree someone in to secure a kill, but dont go offensive, since you are very squishy.

Refresher Orb is incredibly effective when your on a lane for pushing, simply cast Treants and order them to attack the lane, teleport to Base and cast your Ult, Refresher Orb, Ult, teleport back to lane and cast Treants again - Ridiculous Money.