I just got out of a game against a Thresh and Sona Duo bot lane and the sona's damage was.. absurd to say the least she could push me and a nami out of lane without the thresh even needing to land a hook.. I'm not saying sona's needing a Heal or Movement nerf but maybe Decrease her damage or AP Ratio? 
FOR JUSTICE1 votesthe sona in your case wasn't a support sona. she was an APC that took CS, thresh was the support. and she went 
into 
after getting a 
. any champion given the gold and building damage items should do just that, damage.
IRFodder1 votesSona is notorious for power cord Q's when building AP, and like snap said, if she is getting laner gold she will scale, pretty hard infact.
