I don't have any glasses at all. Had one that I got from one of the rewards, but that was used already. I've not had much of a need for them yet.
I'm getting all my radars from pink boxes. I've opened something like 250 boxes by now. Boxes also have the flowers in them, so a good portion of my event items are from the boxes. The boxes themselves are hard to snag if you are not fast enough, so you have to want it and be on top of them when they appear.

Also, I used half peronamins to get me to EX stage on first night of the event. Because of that, I'm ahead of you since I've spent a ton more stamina. I consider this to just be an RNG event type so far from what I'm seeing.

It's also true that I have barely used any peronamins since the game started. Maybe a half or so if I really needed to. That's why my stock is so large.