Enhancement Shaman
Rotation
Opener: Rockbiter early, Windfury Weapon from 30, Strength of Earth and Grace of Air totems, Stormstrike, Earth Shock.
Priority: Stormstrike on cooldown, Earth Shock (or Flame Shock) inside the Stormstrike window, auto-attack with a slow two-hander for Windfury procs. Keep the totems appropriate to the fight.
Cooldowns: Elemental Mastery is Elemental's; Enhancement's cooldowns are Windfury procs and Shamanistic Rage-style tools Forever has not added. Grounding Totem for casters.
Forever notes: The Nov 2 notes gave Enhancement more weapon damage; Windfury on a 3.5+ speed two-hander is still the whole spec.
Stats
Hit to 9%, Strength and attack power, Crit (Flurry), then Agility, then Stamina. A slow two-hander or two slow one-handers for Windfury.
Windfury scales with weapon speed and top-end damage; it is the stat that matters most.
Numbers for every spec and a gear comparer: stat weights.
Where it ranks
See the tier lists for PvE and PvP placement, and Classic vs Forever changes for what Blizzard altered in this class.
Wowhead and Icy Veins keep spec guides of their own: Icy Veins Enhancement Shaman, Wowhead class guides. Our rotation notes are editorial, written for the Nov 2 tuning.