Shadow leveling order 16/0/35
Discipline: Wand Specialization 2, Twin Disciplines 5, Mental Strength 3, Improved Power Word: Shield 3, Meditation 3
Shadow Magic: Shadow Focus 5, Spirit Tap 5, Improved Mind Blast 5, Improved Shadow Word: Pain 2, Mind Flay 1, Improved Mind Flay 2, Vampiric Embrace 1, Shadow Weaving 3, Silence 1, Devouring Contagion 2, Early Demise 2, Darkness 5, Shadowform 1
The 1–60 levelling order (13/3/35). Alternatively, take Twilight Focus and Shadow Reach before 30 instead of Shadow Focus and the last Improved Mind Blast points. With Wand Specialization, Shadowform comes at 42; skip it for Shadowform at 40. Or level Discipline to 39 and respec to Shadow at 40 instead. With the Talented legacy perk every step comes up to five levels sooner.
Shadow, level 30 2/3/16 Tested in beta
Discipline: Wand Specialization 2
Holy: Twilight Focus 3
Shadow Magic: Shadow Focus 1, Spirit Tap 5, Improved Mind Blast 2, Improved Shadow Word: Pain 2, Shadow Reach 2, Mind Flay 1, Improved Mind Flay 2, Vampiric Embrace 1
The "Deep Shadow" levelling build (level 30): Wand Specialization, Twilight Focus for pushback, Spirit Tap, Mind Flay and Vampiric Embrace at 30. Alternatively, go 0/0/21 with Shadow Focus 5, Improved Mind Blast and Shadow Weaving instead, but no Spirit Tap or Vampiric Embrace. Order: Wand Specialization, Spirit Tap and Twilight Focus first, then the Shadow talents in the levelling order's sequence.
Shadow, level 60 (projected) 18/0/33 Guide's pick, untested
Discipline: Wand Specialization 2, Twin Disciplines 5, Silent Resolve 3, Mental Strength 3, Mental Agility 1, Inner Focus 1, Meditation 3
Shadow Magic: Shadow Focus 5, Improved Mind Blast 5, Improved Shadow Word: Pain 2, Shadow Reach 2, Mind Flay 1, Improved Mind Flay 2, Dark Inspiration 1, Vampiric Embrace 1, Shadow Weaving 3, Silence 1, Devouring Contagion 2, Early Demise 2, Darkness 5, Shadowform 1
The "Standard" 18/0/33 build: deep Shadow to Shadowform with Early Demise and Silence, and Meditation and Inner Focus from Discipline. Beta theorycraft: nobody can test above 30. Order: derived from the Shadow levelling order, dropping Spirit Tap (not in this build): Shadow first to Shadowform, then the Discipline mana talents.