I had over nine thousand sapphires left over, I stopped spending them after my attack reached fifty and my wait time was down to forty-five seconds per attack, and I also only got five gems.
 
 
@Background Pony #6D4A  
I did not spend any money at all on this event. Just a lot of time and effort. I had to set timers for when my attacks were fully reset. The reset time always changed. Sometimes it was two hours, sometimes it was two and a half hours, sometimes it was an hour and a half sometimes it was two hours forty-seven minutes. The hardest part was doing the math while I was half asleep at three a.m. and setting the timer accordingly.

I didn’t even finish this time. $30 for the helpers was just too much.