Lightning based blaster build?

[Witty Username]

Elemental Affinity adds the bonus to one damage roll, not one target. That distinction matters, because spells where you make a single damage roll and apply the result to multiple targets - such as, say, the vast majority of AoE damage spells, or spells like Magic Missile where you roll once and multiply - will effectively multiply the damage

Weird, I recall it having a really clunky wording like "you may add your charisma bonus to the damage roll against one of those targets" but doesn't seem to be.

Either way it offers less than Evocation wizard which has the same effect with better spell manipulation effects like sculpt spells, or scribe that has proxy targeting and a much wider range of applicable spells for Lighnting damage.

Sorcerer just doesn’t offer much for blasting.