Port Translation without "no dest nat" option

It depends on the setup you are trying to achieve.

If you have traffic coming into a specific port as in my example, (virtual-server port 80) and you want to map that to the same port on the real-server, simply use the same port. (as I did with server1)

If you do not want to do anything on the port level, you can do L3 load balancing, port information will then be preserved. You can use that in combination with wildcard VIPs.