Oh come ON, typical sorcerer is going to cast FIREBALL! 8d6 averages to 28 damage, level 2 fighters have an average of 21 HP. Saving throw DC is probably 18, fighter Reflex save is probably +0. So, *maybe* one of the Fighters makes their save and survives with 7 hp, while the rest are all at -7 HP and dying. An optimized, blasty Fire Sorcerer would have turned them all to dust, save or no.