Everyone knows that a new set or the same set comes back each month (but not all months) but the problem is, if you just newly joined or you got scammed or you are like too broke to buy a set then just literally farm.
When a new set or the same set comes my brain is like TRULY ALERTED to farm diamonds!
Though I don't have any gamepasses! But to do this routine you MUST have a private server, which you can lookup for private servers on google or any other searching browser you have, example: Microsoft Bing, Microsoft Edge, Google, Firefox.
First of all, starting in the morning, you MUST collect your logins EVERYDAY, no skip days, no stop days.
Fountain (Lookup for halo answers/diamond answers on your browser, worst things are lose diamonds and nothing)
Wheel (Just tap on it and choose either wave 1 or 2, and of course you won't lose diamonds like the fountain but still the worst things are death and nothing)
Computer login (Sit on your chair and wait for your character to type and get diamonds instantly with no effort!)
Farm diamonds at campus 2
Since your in a private server, you can literally just collect diamonds around with no annoyance!
You could lookup on your browser "Royale High campus 2 diamond locations" and try to remember the locations so next time you won't have to watch it again!
Enchantix High
Your still in your private server, do the same as what you did in campus 2
That's all! After Enchantix High, go back to campus 2 and like repeat these steps except your logins because they reset every 20 hrs and the fountain resets every 2 hrs, look at your energy bar every time you're done collecting diamonds at either enchantix high or campus 2, if your energy is 0%, go to sleep at either your apartment, trading hub (If you're level 75 or more), beach house or diamond beach.