Hymn of Valor casts a spell that attacks 2 nearest enemies (Champions as main target) And increases Sona's and his Allies Ability power and Attack damage while active.

Aria of Perseverance 1 nearby ally with lowest health and yourself and increases Armor / magic Resist while active.

Song of Celerity boosts Ally movement speeds.

Crescendo stuns every enemy champion the way you cast it! Best time to use it is at teamfights

In team fights just cast Hymn of Valor and Aria of Perseverance to get the most out of your self!

When you get Tear of the Goddes you should just spam all spells as much as you can at base and keep casting your as much as you can

REMEMBER TO PLACE WARDS ALL THE TIME!