T-Block has some excellent bass runs in his lessons somewhere in prior posts. I play them often. It was so long ago I have no idea where. Try a search for bass runs. I think one run is Eb, back down to G, Ab A, Bb, C, Db, or(C#) D, Eb. Victory is Mine and other songs can be played over that run. (partially)
Eb, D, Eb,E,F, G Ab, A, Bb twice F twice Bb B, C, back Gb
Over the line, Victory today is mine. Then, F, G, Ab, A, Bb, B, C, Gb twice. I told satan, get thee behind. G, Ab, A, Bb, Eb. Victory today is mine.
A 1, 3, 5, 7-8 played rhythmically is a good simple bass run. Or a I, 8, 7, 8.
Actually, most of the time I don't know what I am really playing with my left hand. I will sometimes consciously make note so that I don't repeat too much. Hope that helps
berbie