20-30 is still sandstone spells/spellshards. Grab some spellcraft scales and use the following spell formula when you hit it's opt (about every other level):
Prime Bolt (200)
Health I (220)
Countercheck Primal (250)
Quickening Breeze (270)
Arcane Refusal (280)
Spells/spellshards are the quickest way to level low levels. When you hit 400 smelting, you can make your first metal compound, steel. At this point, switch to metal compounds all the way till 100.