Load Balancing + Port Forwarding problem

RouterOS General
1

hi i have nat problem when users want to use party chat on ps4 or xbox1 and many other software . clients r using router too so they have a firewall as well
5 isp > mikrotik(staitec mack ip binding clients) pcc 5 wan > one lan > switch > clients router > ps4,x1(etc)

this is my mangle


add action=mark-routing chain=output connection-mark=ether1_conn \
    new-routing-mark=to_WAN1
add action=mark-routing chain=output connection-mark=ether2_conn \
    new-routing-mark=to_WAN2
add action=mark-routing chain=output connection-mark=ether3_conn \
    new-routing-mark=to_WAN3
add action=mark-routing chain=output connection-mark=ether4_conn \
    new-routing-mark=to_WAN4
add action=mark-routing chain=output connection-mark=ether5_conn \
    new-routing-mark=to_WAN5
add chain=prerouting dst-address=192.168.100.0/24 in-interface=ether6
add chain=prerouting dst-address=192.168.200.0/24 in-interface=ether6
add chain=prerouting dst-address=192.168.111.0/24 in-interface=ether6
add chain=prerouting dst-address=192.168.3.0/24 in-interface=ether6
add chain=prerouting dst-address=192.168.5.0/24 in-interface=ether6
add action=mark-connection chain=input connection-mark=no-mark in-interface=\
    ether1 new-connection-mark=ether1_conn
add action=mark-connection chain=input connection-mark=no-mark in-interface=\
    ether2 new-connection-mark=ether2_conn
add action=mark-connection chain=input connection-mark=no-mark in-interface=\
    ether3 new-connection-mark=ether3_conn
add action=mark-connection chain=input connection-mark=no-mark in-interface=\
    ether4 new-connection-mark=ether4_conn
add action=mark-connection chain=input connection-mark=no-mark in-interface=\
    ether5 new-connection-mark=ether5_conn
add action=mark-connection chain=prerouting connection-mark=no-mark \
    dst-address-type=!local in-interface=ether6 new-connection-mark=ether1_conn \
    per-connection-classifier=both-addresses-and-ports:5/0
add action=mark-connection chain=prerouting connection-mark=no-mark \
    dst-address-type=!local in-interface=ether6 new-connection-mark=ether2_conn \
    per-connection-classifier=both-addresses-and-ports:5/1
add action=mark-connection chain=prerouting connection-mark=no-mark \
    dst-address-type=!local in-interface=ether6 new-connection-mark=ether3_conn \
    per-connection-classifier=both-addresses-and-ports:5/2
add action=mark-connection chain=prerouting connection-mark=no-mark \
    dst-address-type=!local in-interface=ether6 new-connection-mark=ether4_conn \
    per-connection-classifier=both-addresses-and-ports:5/3
add action=mark-connection chain=prerouting connection-mark=no-mark \
    dst-address-type=!local in-interface=ether6 new-connection-mark=ether5_conn \
    per-connection-classifier=both-addresses-and-ports:5/4
add action=mark-routing chain=prerouting connection-mark=ether1_conn \
    in-interface=ether6 new-routing-mark=to_WAN1
add action=mark-routing chain=prerouting connection-mark=ether2_conn \
    in-interface=ether6 new-routing-mark=to_WAN2
add action=mark-routing chain=prerouting connection-mark=ether3_conn \
    in-interface=ether6 new-routing-mark=to_WAN3
add action=mark-routing chain=prerouting connection-mark=ether4_conn \
    in-interface=ether6 new-routing-mark=to_WAN4
add action=mark-routing chain=prerouting connection-mark=ether5_conn \
    in-interface=ether6 new-routing-mark=to_WAN5
2

please guys