User blog comment:YaoiBlossom/TennStar's AD Sona Guide/@comment-4434378-20120502001233/@comment-4301192-20120502224027

The thing is, when you build her AD, she lacks mana and mana regen. You don't want to use up your mana too fast and have to recall constantly. It loses you potential CS. Yes, late game she does better with ability cooldowns and mana, but when your crit-ing for 1200 and doing 400-500 outright, then the spam should be less.