Treant Protector is a melee strength support hero. He is unique in his ability not only to heal allied buildings (outside of an Omniknight with Aghs) but also to globally heal and protect an allied unit from the get-go.
Skills
Nature's Guise is always skilled and maxed last.
Leech Seed is usually skilled second (unless roaming) and always maxed second.
Living Armor is usually skilled first (unless roaming) and always maxed first.
Overgrowth is always skilled (levels 6, 11 and 16).
Items
Starting Items: Courier and/or Observer Wards, Tangos, Healing Salve, 3x Iron Branches, Clarity.
Early Game: Flying Courier, Observer Wards, Boots of Speed, Magic Wand, Bracer.
Core Items: Arcane Boots, Mekanism.
Luxury Items: Blink Dagger, Force Staff, Vladmir's Offering, Drums of Endurance, Necronomicon, Heaven's Halberd, Shiva's Guard, Assault Cuirass, Crimson Guard.
Situational Items: Boots of Speed, Pipe of Insight, Medallion of Courage, Refresher Orb.