I don't understand how you have such issues with the Gambit, especially with those levels of activity. Of course Coli/EG are far more activity reliant since Focus restores faster than Stamina, but you should still be able to use that activity to open tons of pink boxes (and no, a couple of your friends having EA as friend does not lose you all your boxes). I'm around the same level as you so we should roughly have the same max stamina. During the Gambit I got so much value out of one peronamin (half) that I'd basically break even, so I could throw tons of peronamins at the event. Heck, even after going for a massive rush near the end as I was really close to a top 300 spot I ended up with more peronamin than I had at the start of the event. I ended with 100k+ stamps and all I had was one R slayer, so even without that it'd been easy. On top of that I barely played for 4 days due to circumstances, which was the main reason I actually had to spam consumables to get back into the top 300. Even at the Gambit before that, where I wasn't so lucky to get an early r slayer, I still easily got the 50k stamps and that was at a lot lower level, so less value out of peronamins. Although of course glasses were far more common at that Gambit, which obviously was a big factor for my 50k+ on that event.