https://www.mut.gg/23/lineup-builder/5cf0b6f5-43c8-435c-964e-537426897050/
Some solo challenges I have not started/completed are: UL, Legends, AKA, AKA New Class, FA, GC RoH, All Madden, CH2, Team Diamonds, Harvest, Hispanic, Most Feared, Combine, Nickmas, Playoffs, Super Bowl, Team Affinity, Team Captains (I have Eric Allen), WW, Zero Chill, Mission MUT (I chose Reggie Gilliam as my crew captain, and both Draft solos.
I run Outside Zone runs, Play Action Passes, and Zone Coverage. I have about 175k coins.