Last I checked, the general consensus was it was good to have swap to deal with unexpected temporary out of memory conditions. Back in the day we used to provision server swap with 1.5X physical memory, but that was when systems had a lot less memory than they do today.
With a host with that much RAM, I suggest either keeping a small swap space, or set it up with no swap at all, and do some load testing to determine how the machine performs in low memory conditions. If that testing is ok, then don't even set up any swap at all.
Remember you can always set up a swapfile later if you need one.