Is 60 vision score at 30 minutes good for a support?

That's always the score I'm trying to aim at only using meaningful wards, meaning I won't start buying control wards and spamming them down on base just to improve my vision score. What counts as a good vision score for a support? As I said, I'm always aiming for the 60 before 30:00, but I'm not sure if that's good or bad. (And once again, WITHOUT spamming wards just to improve your vision score.)
Report as:
Offensive Spam Harassment Incorrect Board