Fire Ball, for the strict Fire-based Sorceress, will most likely be a prime weapon of choice. With it's combination of synergies, fast cast rate, already massive amount of damage, chance of a short stun period, and decent range on impact, this is one of the Sorceress' most deadly Fire Spells weapons.
Once she has learned this incantation, the Sorceress can collect a large amount of elemental fire and contain it within a globe of energy. Discharged toward the enemy, those energies are released in a devastating explosion. This spell of mass destruction is ideal for bombarding enemy encampments.
↑Diablo II Manual, page 86. Blizzard Entertainment, 2000.