Razor is a ranged agility semi-carry, or more accurately an anti-carry, who is notable for his ability to drain damage from a foe and acquire it for himself. He is a versatile laner, capable of playing mid or on one of the side lanes, and has decent damage output from abilities as well.
Skills
Plasma Field is usually maxed first.
Static Link is skilled first but usually maxed second.
Unstable Current tends to be maxed last.
Eye of the Storm is always skilled (levels 6, 11 and 16).
Items
Starting Items: Tangos, Healing Salve, Circlet, 3x Iron Branches.
Early Game: Power Treads or Phase Boots, Magic Wand, Ring of Aquila.
Core: Mekanism.
Luxury Extensions: Drums of Endurance, Heaven's Halberd, Butterfly, Black King Bar, Crimson Guard, Manta Style, Eye of Skadi, Heart of Tarrasque.
Situational Items: Bottle (if mid), Boots of Travel (late game), Aghanims Scepter & Refresher Orb (powerful combo), Necronomicon (pushing line-up), Monkey King Bar (anti-evasion).