@Ktty You can boost that number to 5/8 tries by simply running far away from Subaru. I did it and had the event completed casually in 2 days. It's not a 100% solution but it's easier with less conniption fits.
Tried and got ZERO out of my 5 daily try's. Couldn't get far enough away quickly enough before they agro'd him. He died all 5 tries. As I said, I tried all the posted solutions and not one works for me.