Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This is based on another guide posted on Solo Mid by Magique89. Follow the link for a more in-depth description.
Why is this here?
I prefer MobaFire's build format because of its accessibility. All of the information like skill sequence, items, etc. are all easy to see at the same time, which makes guides on MobaFire much easier to use when compared to other sites. When I find a build I like, I usually post it here so I can use it in game.
Magique's Original had one point in Utility Mastery. I switch this to Greed. Sona usually won't be taking buffs, and I feel the small gold boost from Greed is more helpful in the long run.
Rod of Ages If you have time
Morello's Evil Tome Mana regen
Lich Bane DPS proc
Zhonya's Hourglass Safety
Soul Shroud Best support
Aegis of the Legion Aura support
Will of the Ancients Ap team
Quicksilver Sash More Safety