It's also meant to be a template for your style of play because your now not going to be able to heal for 4900 every 2 seconds (exaggerating I know but still) it shows how to support instead of being a healer and no support are not healers like most people say they are they are for boosting stats, occasional heals, and dealing damage with added effects (sometimes). Also support are made to make someone survive longer... Support is just you supporting your team it's played how it's said support your team.

Yeah gonna play some games with her and get back to the build.
Also thank you for pointing out the vigor meant to put the mana regen ones instead >_<

You have a few errors such as placing x9 of the Quint runes, and also on the top part you have Quints of Vigor (Hp/5) and in the explanation states that you will be using a lot of mana. I also noticed multiple sections have very brief and vague explanations. I am very unfamiliar with the support role and have never used Sona, so i wish you had better explanations. I will hold my vote.