I played the whole Event like a maniac -- I am retired so I have all time in the world to waste in this game -- and I finished the Event on Sunday with 5 bases, between 4 and 5 PM what gave me time to get 3 crates before sleeping, and because I can't sleep more than 6h, I could get 7 crates with my two HQ 6, HQ 8 and HQ 9, and 6 crates with my HQ 11 on Monday and Tuesday. Wednesday I started to get tired and quit with my HQ 11 and HQ 9. Today, I woke up early, opened the crates for the other 3 bases, and started the research for one last crate for Rebel HQ 6 and HQ 8 that ended about 10min before Event end.
Imperial HQ 6: 24 Crates
Rebel HQ 6: 26 Crates
Rebel HQ 8: 25 Crates
Rebel HQ 9: 18 Crates
Rebel HQ 11: 17 Crates
While opening crates I noticed I earned Bronzium Crate in Tat conflict for my HQ 11, the 16 frags allow me to upgrade the R2-3P0 skin to Level 6.
The start of the Event at 12 AM here helped me to sync the 4h-8h-8h researches with my sleeping. I also used crystals to get 10-20 EP without have to do another attack and rush 1h and 2h of the last researches for my HQ 11 to complete the Event in the same hour than my low level bases due to its high EP requirements and troop loading time.
I say that the 720/790 EP in the Event missions for Prestige are too high! It's the only complaining I have about this Event, everyhting else was good.