You really should restrict the console to a single link. The consoles start to do weird crap when you split the IP traffic down multiple paths.
It looks like you assigned a static IP of 192.168.1.15 to your PlayStation. Good. We are gonna use that for the example configs
Not to be a jerk, but it really is better to let UPNP do its job. Personally, I would delete the manual forwarders that you have created. Since you are going to limit the outbound traffic to one WAN link, all the inbound stuff will come in that WAN link.
Here we go.
First - assign static IP (check)
Second - limit the outbound traffic to the WAN link with the quickest response time. Latency is key with online gaming. Whichever gives you the best ping response to sites on the internet is the pony you want to pick. Do this by going to Network->Outbound policy. put in a new rule named PS4_WAN1 and put in the source IP of 192.168.1.15 and choose “Enforced” as your balance algorithm. Choose WAN1 as the link. The destination should be ALL and the port number should be ALL and the port type will be BOTH.
Third - Open the firewall up to 192.168.1.15. Do this by going to Network->Access Rules (underneath Firewall). Add a new rule named PS4_OPEN. The source will be ANY, the Destination will be the IP Address 192.168.1.15. Protocol will be BOTH. Port number will be ANY. It is your choice as to whether you allow it for All Wan links, but make sure that the WAN you are sending the outbound traffic to is included. I like to enable logging for all of my inbound rules.
Fourth - clear the NAT-PMP and UPnP state. Go to Status->NAT-PMP. This area is what you don’t get access to with most commercial routers for home use. Delete anything that you might have there by hitting the red X. Don’t worry, everything will recreate itself.
Fifth - Completely shut down the PS4. unplug it from the wall for a minute.
Sixth (optional) - if you are like me, you have probably done it on your own and tried 1000 different combinations. Restart the router if you can.
Seventh - once the WAN links are established again, start up the PS4. Confirm the UPnP and NAT-PMP settings by looking at the status page of the router (you are going to fall in love with this page).
Eighth - (optional, but highly advised) Route ALL other traffic elsewhere. Right underneath your Outbound Policy rule (the one that keeps all the PS4 connections to 1 WAN), create another rule named “non-games”. Set the source IP to ANY. Set the Destination IP to ANY. Protocol type of ANY. Set the algorithm to Overflow (since you have three other WAN links) and make the last one in the list be the WAN you dedicated for gaming. You will notice there is a “Enabled” checkbox. Turn it on while gaming and then disable it when you are done.
At the end of it, you should have an Open NAT type that is dynamic in nature (you won’t need to add new forwarders when a new game or feature is released by PS4), a dedicated WAN link just for the PS4, and a hella smile since you have got it all sorted.
I am invested now, so please let me know how it works out.