Sona is an old Champion, she excell in winning lane by poking foes and healling allies, having a powerfull early she has strong late game aswell with her ult and mouvement buff.

Hello guys i played League of Legends since season 1 and was a kid, im not a pro player , but at least I know really well the game and support is my main role, I played almost 95% of my game support. I hope that you will like my build!

Don't be shy to report grammar error english is my second language!

Pros

+ Good Poke
+ Good Sustain
+ Have an AOE CC ult
+ Mobility
+ Flexible

Cons

- Squishy
- Can easly have mana problem
- Relly on ally to get protected
- Assasin can kill her easly

Flash is so great on her for helping her on iniating fight, escaping or even saving an ally she can't be play without it.

Ignite is important for preassure kill in lane.

Exhaust can be took, if your playstyle is more oriented late game with sona or that assasin like Zed are found in the ennemie team.

1- Mark: Hybrid penetration rune provide you more dommage with auto attacks and Hymn of Valor when trading in lane.
2- Seal: These are the best option in seal, because of the tankiness they gave in early stage since Sona is trading a lot and is squishy.
3- Glyph: These rune are the best set for have a great sustain in early the early stage with your mana and since you will have too take magic dommage in trading process you need a minimum of 4 glyph of magic resists.
4- Quintessence : 8.46 armor is minimum for trading correctly and I took mana regen for the same reason of Glyph setting.

Since Song of Celerity is great, in the early stage, you don't need it and not putting point in it will gave you tons of domage and healing since you putting them in Hymn of Valor and Ariaof Perseverance . Since Crescendo putting point in it upgrade aura of other spell and it is her ult naturaly we are putting point whenever we can.

EARLY GAME

In early stage of the game you want to trade a lot and play agressivly most of the time try to used Aria of Perseverance before getting hit if your already not full for getting profit of your shield that the aura gave and if you expect receive dommage in the trading use your passive with the stance of healing for reduce dommage mostly of the time you will won the trade and if you don't at least you can heal you and yours allies, ward a rivers and around for being of not getting gank in the process.

MID GAME

Try to roam with your ult you should be able to take easy kill and make sure to always ward dragon and pink ward it is not a bad idea, try to have vision of the enemies jungler for getting you and your team safe of ambush.

LATE GAME

Mostly same thing of the mid game the only difference is to avoid to ward alone in the enemy jungle, stay close of your adc after the fights engage and use whathever you can to keep him alive, and keep vision on baron and dragon when the crabs is taken by the other team or that the crabs didn't respawn.