League of Legends (LoL) Question: Sona in game/teamfights

Focus on keeping your teammates healed with Aria of Perseverance and keep its aura up. Worry about dealing damage later unless you're winning with no problem. Try to hit as many as you can with Crescendo. You can use it to initiate, to secure a kill, or to save your teammates from a bad fight. It's up to you on which of these you would use it on.

Take note of your passive. Power Chord can drastically change fights around if you hit the right people with it, especially the Aria of Perseverance version on carries or damage dealers. Hymn of Valor's version can be used to burst down a champion, while Song of Celerity's version can be used to chase or escape given the right situations.

Power Chord Aria of Perseverance : use on fed ADC/APC or someone going on your adc so they can outdmg them

Power Chord Hymn of Valor : It shines in early game because of high dmg output but imo you should only use the aura for teamfights and keep the powerchord for another aura

Power Chord Song of Celerity : When you're chasing/escaping someone. Happens when the other teams starts to run away because they cant face yours.

Sona ult is game changing so you should try to hit the most ppl with/the most dangerous champ. positioning is important.
Sona is probably one of the best support as she bring a bit of everything and can ajust to everything.

spam all ur ablities, hit as many as possible with ur ulti.
Good aura items: Aegis of the Legion, Shurelya's Battlesong. Thats it i guess