When you do the most damage in aram

Sona has more harass, and can target multiple people at once with it. Depending on the items you build, self targeting or aoe spells tend to amount to greater damage to champions.

Sona build AP on ARAM and have aoe dmg, she usually deal a lot of dmg if not the most. But have a my special snowflake ;)

I have yet to learn the ways of master aram sona