I use guns. The best place to be upclose is being stationed directly in front the stacks. Mine grab the lows better than the ATs because they are 20-20,000 khz. AT835s are tinny because I believe they are 50-20,000 khz. I could be wrong.
Stationed and pointed at the stack, your FOB will sound better than cards or omnis all day long. That's because your recording is focused on the music instead of the crowd/music matrix. If the fans are more into the mood of singing, like U2 or DMB shows, then being farther back is the best or going with cards or omnis up close. If they are not a singing crowd, then the band should be your focal point. Its all about directionality. That's just my 2 cents.