Let me know if you see anything you disagree with or anything you do differently :D
Armor Marks (8.2)
Mana Regen Seals (3.7/5)
AP Glyphs (11)
AP Quints (15)
Mental Force-Expose Weakness
Fleet of Foot-Meditation
Spellthief's, 1 health pot, 1 mana pot, 1 green ward, warding totem
Sightstone, Pink Ward, sweeping lens
Frostfang, Boots of Mobility
Chalice of Harmony
After Gauntlet, I go either Mikael's or Athene's (Mikael's if enemy team has lots of cc). Then I go Locket of the Iron Solari if they are double ap or poke based, or zhonya's/frozen heart if they have a lot of ad. If we are ahead and have a lot of ap, I build Abyssal Scepter.
(q) POKE. Use q into auto attack to get 2 or 3 charges of spellthief's and a ton of dmg.
(w) Keep your adc sustained, but use potions as much as you can for your own health. Don't forget it also gives a shield to any ally in range.
(e) use this speed boost to avoid ganks primarily, but you can also use it to dodge skillshots and get in close for an engage.
(r) ult to turn around fights or engage them. try to avoid using this for disengage if possible, but don't forget it is still a disengage tool.
ROAMING is so important on Sona. Get those Mobi Boots early and USE THEM. Go mid and gank with the jungler. Help defend towers while people are backing. But be careful to warn your adc first, leaving the squishy carry alone can be dangerous.
Again, feel free to question and comment! Enjoy :D