Mikrotik Load Blansing Rb750 2+2+2+2 = 8

/ip pool add name=dhcp_pool1 ranges=10.10.10.2-10.10.10.254

/ip dhcp-server
add address-pool=dhcp_pool1 disabled=no interface=Local name=dhcp1

/ip address
add address=192.168.1.2/24 interface=WAN1
add address=192.168.2.2/24 interface=WAN2
add address=192.168.3.2/24 interface=WAN3
add address=192.168.4.2/24 interface=WAN4
add address=10.10.10.1/24 interface=Local

/ip dhcp-server network
add address=10.10.10.0/24 gateway=10.10.10.1

/ip dns
set allow-remote-requests=yes cache-size=5000KiB max-udp-packet-size=2048 servers=182.176.18.11,8.8.8.8

/ip firewall mangle
add action=mark-routing chain=output connection-mark=WAN1_conn new-routing-mark=to_WAN1
add action=mark-routing chain=output connection-mark=WAN2_conn new-routing-mark=to_WAN2
add action=mark-routing chain=output connection-mark=WAN3_conn new-routing-mark=to_WAN3
add action=mark-routing chain=output connection-mark=WAN4_conn new-routing-mark=to_WAN4

add chain=prerouting dst-address=192.168.1.0/24 in-interface=Local
add chain=prerouting dst-address=192.168.2.0/24 in-interface=Local
add chain=prerouting dst-address=192.168.3.0/24 in-interface=Local
add chain=prerouting dst-address=192.168.4.0/24 in-interface=Local

add action=mark-connection chain=prerouting dst-address-type=!local hotspot=auth in-interface=Local new-connection-mark=WAN1_conn per-connection-classifier=both-addresses-and-ports:4/0
add action=mark-connection chain=prerouting dst-address-type=!local hotspot=auth in-interface=Local new-connection-mark=WAN2_conn per-connection-classifier=both-addresses-and-ports:4/1
add action=mark-connection chain=prerouting dst-address-type=!local hotspot=auth in-interface=Local new-connection-mark=WAN3_conn per-connection-classifier=both-addresses-and-ports:4/2
add action=mark-connection chain=prerouting dst-address-type=!local hotspot=auth in-interface=Local new-connection-mark=WAN4_conn per-connection-classifier=both-addresses-and-ports:4/1


add action=mark-routing chain=prerouting connection-mark=WAN1_conn in-interface=Local new-routing-mark=to_WAN1
add action=mark-routing chain=prerouting connection-mark=WAN2_conn in-interface=Local new-routing-mark=to_WAN2
add action=mark-routing chain=prerouting connection-mark=WAN2_conn in-interface=Local new-routing-mark=to_WAN3
add action=mark-routing chain=prerouting connection-mark=WAN2_conn in-interface=Local new-routing-mark=to_WAN4


/ip firewall nat
add action=masquerade chain=srcnat out-interface=WAN1
add action=masquerade chain=srcnat out-interface=WAN2
add action=masquerade chain=srcnat out-interface=WAN3
add action=masquerade chain=srcnat out-interface=WAN4

/ip route
add check-gateway=ping distance=1 gateway=192.168.1.1 routing-mark=to_WAN1
add check-gateway=ping distance=1 gateway=192.168.2.1 routing-mark=to_WAN2
add check-gateway=ping distance=1 gateway=192.168.3.1 routing-mark=to_WAN3
add check-gateway=ping distance=1 gateway=192.168.4.1 routing-mark=to_WAN4