2 Banjo and 1 Sitorak - 14 runs in Mayhem 4

After the 10th run of Psychobillies, I got the Banjo on the 11th and 12th run. (Last night I did 6 runs and nothing)

I did the Unstoppable 4x before I got the shield. I didn’t realize they were nearby.

Mayhem 4 does not increase the chances.