As above, I would take a clean and mic from the cab, or secondary DI from the amp or whatever feed is being thrown at me. This means, that if any bass player has removed their lows because their cab can't cope (unlike the big subwoofers at foh), or done something like scoop the mids so they don't cut through etc, etc... with the blend of the two all bases are covered at all times. I'm running Waves Multirack - I think I have infinitely more tools at my disposal to make things sound right in the mix than the bass player on stage who can't hear what's happening out front!
Of course, this is just the way I work, other people may work differently - or may not even care what the band on stage sounds like!