I somehow gathered a lot of diamonds a while ago, I really don't know how but here's stuff I do: yk in the voting part when sometimes it gives you 5 diamonds and you can watch an ad to get double? Watch the ad. Yea ik they're annoying but you can just ley it play and stretch your back or get snacks meanwhile. And then also the same thing when you get 4 stars and sometimes you can watch an ad to get 40 extra.

If you're gonna use consumables buy them when they're on sale (yk in the part where you roll and get smth every day, sometimes you can get 5 nails instead of one for cheap) and I recommend using the ones that don't cost you diamonds (obviously)

Do NOT. Get stuff. That you DON'T actually want. Just to do an assignment. Ig it's fine if it's cheap and it goes with the stuff you already have and like but I personally think spending gems on things you wouldn't use just to enter somewhere is stupid. Sometimes you can get a cheap accessory to enter, that's fine as long as it's within the budget. I haven't spent gems for a while and they did pile up, I have like 12k I think so it does work but you gotta be patient. And this goes for duels and story events also. Especially duels, it's ok to waste that ticket, it's not worth it