Returning Player - O3 Server

I have returned to realm because the reworks made the game fun again.

Never beat O3 so that's my goal but since 2 Weeks and 30hours of gametime i did only get two O3s.

Mainly play on EUW and go to the realm with most players. O2 happens almost every 30min but no O3.

I do NOT want to do Discord Runs again because they destroyed the game for me in the past.

My Question is if there are certain Servers people do O3s on or if you guys have tips how to get more because i really want to practice them.