FortiNet 60F Questions

I am working to phase out an aging CyberRoam CR35ing with a FortiGate 60F but have ran into a couple of things that I can't seem to find a decent explanation of.  The FortiGate 60F is running the latest available firmware at this time of 7.2.2 for reference if needed.  I'm going to cross one bridge at a time so-to-speak so please bear with me.

1. On the CyberRoam there is an option called Aliases (pictured below) that allows you to have multiple static IPs coming from one physical connection.  In this particular case it happens to be from our ISP where we have the static IPs of x.x.x.50 - x.x.x.54. I've looked through the different options in the FortiGate but haven't seen anything that is the equivalent of being able to assign something like this to these IPs.  This is important as we have programs and apps that rely on these IPs to be available and be mapped through the firewall.  Can someone provide more insight on how this can be accomplished or if it's even possible?  I had thought about possibly using a VLAN to obtain the same result but wanted more opinions on it.  I know that I can use Virtual IPs as well for the 3 other IP addresses but that simply gives them an internally facing IP.

2.On the same CyberRoam appliance we use an option called Virtual Hosts (pictured below) to essentially map external IPs and ports to internally mapped IPs and ports.  I know that I can do this by using Virtual IPs on my 60F but when I attempt to assign them I'm running into a small problem.  When I attempt to add a range of IPs (i.e. x.x.x.221-x.x.x.226) it tells me that it's an invalid IP address.  If I just put the starting IP address in it works fine. 

• Do I need to create a new Virtual IP for each of these IP addresses? 

• Also when attempting to add multiple ports for either the External service port or Map to IPv4 port (i.e., 8080, 80, etc.) it gives me an error of Invalid port value?
• Do these ports need to be individually assigned?

Thanks for any and all opinions and answers!