Indeed, routerOS v7.6, I'll roll back to v6 for now see if that gives me a bit of a difference.
Thank you for the performance explanation, I'll browse through the devices.
/ip firewall nat add chain=dstnat protocol=udp dst-port=7707-7717 in-interface=(interface of internet) action=dst-nat to-addresses=(IP address of server) to-ports=7707-7717