User blog comment:JmLyan/Melodia, the Sacred Voice/@comment-5663427-20131113162850/@comment-7481207-20131113170138

Q are balanced around the fact that it also gives on-hit damage to the rest of your team, and W because it can heal your entire team, Sona's heal is about as low and on a lower cooldown., but only works on two champions. Q deals 280 (+90% AP) on max rank with popularity too. I also noticed that I miscalculated the heal when standing still, so it is slightly higher.