Bane is a ranged intelligence support hero notable for his disables and anti-carry potential.
He is a popular pick in competitive Dota thanks to his unique skill-set which lends itself superbly to certain support duos, but the coordination required to pull off these combos makes him a somewhat niche pick in public matchmaking.
Skills
Enfeeble is usually skilled last but maxed second, however an early point is strongly advised if you're able to disrupt an enemy laner's last hitting with it.
Brain Sap is skilled second but always maxed first.
Nightmare is skilled first in case of a level 1 engagement but is maxed last.
Fiend's Grip is always skilled (levels 6, 11 and 16).
Items
Starting Items: Courier and/or Observer Wards, Tangos, Healing Salve, 2x Iron Branches, Clarities.
Early Game: Flying Courier, Observer Wards, Boots of Speed, Magic Wand, Soul Ring.
Core: Arcane Boots.
Luxury Items: Force Staff, Blink Dagger, Drums of Endurance, Black King Bar, Necronomicon, Aghanim's Scepter, Heaven's Halberd, Ghost Scepter, Scythe of Vyse.
Situational Items: Boots of Travel, Vladmir's Offering, Sentry Wards, Dust of Appearance, Gem of True Sight, Smoke of Deceit.