In this video, I go over how I would create a mastering chain for my live set.
Live set mastering is a lot easier and more gentle that mastering for an album. Your goal should be to achieve level at 0db without clipping an having a clean and consistent sound through out your set. You don't need to be so accurate and discerning to make it sound good coming out the PA. One of the key differences being that your creating a chain to accommodate for multiple tracks, rather than creating a tailored mastering chain for each individual track. Thus, you have to be a lot more gentle and general with your processing.
I cover EQ, Compression, Limiting and even Mid Side processing.
Hope it helps