Yeah I did some rep cashers on FFA as well but hybrid destocked them all. I think set 67 I did over a billion avg nw and at the time they were some of the better cashers that didn’t get fed. I wanna say enshula went a little higher in set 62 or so, but I’m not sure if he destocked as a no feeder casher tho. Maybe worth looking into but his profile from that era is private so would need to really go fish. These are my personal best for cashers without helpers on FFA:

67 15 Porky Pig (#651) 61 $1,339,733,248 HG LoC
67 17 Marvin The Martian (#650) 61 $1,328,140,758 HG LoC
67 14 Sylvester (#649) 61 $1,350,724,676 HG LoC
67 13 Foghorn Leghorn (#648) 36 $1,355,435,153 HG LoC