What are your exercises and assistance work that you use for the 5/3/1. I have done One Man One Barbell with Squat, Bench, Deadlift, Press and utilized lunges, dips, rows, side raises as assistance exercises.
I keep it simple.
Bench press day: Dips, incline/decline DB press, push ups, flys
Squat day: In the hole squats, good mornings, OH squats, hamstring curls, GHD sit ups
OH press day: Arnold/seated BB presses, shoulder mobility with light weight or PVC/bands
DL day: Pull ups, DB rows, good mornings, GHD sit ups, rack DL, back extensions
My main focus is on the primary lift and mobility. I have very little free time right now (thanks to my CoC) and I'm 32, so I stick with what Rusty mentioned above.
5/3/1 takes up very little time as does running 3-4 miles. I throw in a good 30-40 minute CF/HIIT WOD when I have the time because I still really enjoy that type of work.
Grizzlystr , it depends on what your goals are. If you only want to be fast, run 4-5 times a week and scale back the lifting to 2 days/week. If you want to be strong, do the opposite. If you want to be well rounded, you're going to have to find time to mix in a little bit of everything. Again, I don't know what your goals are, so it's hard to answer your question.