Mastering style peak limiters are optimized for the task, often with lookahead, oversampled side chains etc. A regular digital compressor/limiter will be a lot crunchier trying to achieve the same results.
Maybe there is a way to set up the gain structure so that you can clip the peaks and lower the level post clipping? Clip into the group and lower the group? Assuming it's a digital board. A straight clip would probably sound better for 2 to 3dB reduction.
Tomorrow I will engineer a band in a Live Broadcast TV Show,they dont allow the level to peak over -10dbs, the problem is I will have the TV Show engineer next to me and we will share the console.Its a talk show and then theres one band in the end that plays 1 song. Im the engineer of that band so they allow that the bands engineer go there and mix just the band.
You should have mentioned that earlier, because any FCC-approved broadcast must include a brickwall limiter. It is probably included in the transmitter (or exciter) and not user-accessible.So I would suggest you use whatever compressor you have handy to make your mix sound good, without having to worry about overs. I hope the technicians there understand that, though...