I play always as TB. 
I go for only ice blizzard and shatter, so at lvl3 i dont learn new ability, on lvl4 both shatter and blizzard, on lvl5 1 rank of frostnova, lvl6 also skip. lvl7 +1on blizzard and shatter. lvl8 lvl9 are skip. lvl10 +1blizzard and shatter and +1fireball, after that go for fireball, but doesnt worth the use of it until its not lvl3. on lvl15 you can have both the frostfire to improve shatter and fireball, also you can have the blizzard additional forst effect.

until 15th lvl you just blizzard, frostnova, shatter, and run as fast as you can. mana potion, and go back. this is a very high spike damage, also drains your mana almost empty

on 15th lvl you start with fireball for 1350, go for frost, cast blizzard first then frostnova while the ice is falling. they hit in the same time blizzard hit aroud 800, insantly x3 shatter for 1275 , go to fire, and fire ball for another 1350.

in this cycle the changeing is the longest, you have to spend only bout 3 sec as frost.

rest 5 lvl is doesnt matter, as you may spend points as you like.

for this i use staff of renewal, and it is good if you have -15% CD flag.

in the begining a cheap boot. +1hp and mana potion 
stack for HP and armor. and always have mana potions, its worth it.
Later the frost requires many many mana, so you have to stack it, also the crown with -25% mana cost is very very handy.

I hope i could help some fellow TB fan