This is the spec he shows at the ending, it's hard to follow without pausing all the time so i did the work for you.
Level 10 - Elemental Precision 1/3
Level 11 - Elemental Precision 2/3
Level 12 - Elemental Precision 3/3
Level 13 - Improved Frostbolt 1/5
Level 14 - Improved Frostbolt 2/5
Level 15 - Permafrost 1/3
Level 16 - Permafrost 2/3
Level 17 - Permafrost 3/3
Level 18 - Improved Frost Nova 1/2
Level 19 - Improved Frost Nova 2/2
Level 20 - icy Veins 1/1
Level 21 - Improved BLizzard 1/3
Level 22 - Improved BLizzard 2/3
Level 23 - Improved BLizzard 3/3
Level 24 - Piercing Ice 1/3
Level 25 - Arctitc Reach 1/2
Level 26 - Arctitc Reach 2/2
Level 27 - Frost Channeling 1/3
Level 28 - Frost Channeling 2/3
Level 29 - Frost Channeling 3/3
Level 30 - Cold Snap 1/1
Level 31 - Improved Cone of Cold 1/3
Level 32 - Improved Cone of Cold 2/3
Level 33 - Improved Cone of Cold 3/3
Level 34 - Piercing Ice 2/3
Level 35 - Ice Floes 1/2
Level 36 - Ice Floes 2/2
Level 37 - Winters Chill 1/5
Level 38 - Winters Chill 2/5
Level 39 - Winters Chill 3/5
Level 40 - Ice Barrier 1/1
Level 41 - Artic Winds 1/5
Level 42 - Artic Winds 2/5
Level 43 - Artic Winds 3/5
Level 44 - Artic Winds 4/5
Level 45 - Artic Winds 5/5
The build at WOWHead