Pessoal achei uma regra aqui no fórum que era para jogar portas como a 80 e 443 para um link só. Eu fiz umas alterações para meu uso aqui e achei bem legal depois dessas alterações. Agora estou balanceando as portas 80 e 443 para um link e outras como 21, 110 e etc. No outro link. Até joguei o p2p para um link só, assim não deixa o link da porta 80 super carregado.
Abaixo está a regra. Obs.: Altere os IP encontrado no route pelo dos seus links.
/ ip route
add dst-address=0.0.0.0/0 gateway=192.168.15.254 scope=255 target-scope=10 \
routing-mark=link1 comment="Pacotes marcados redirecionados para o link1" \
disabled=no
add dst-address=0.0.0.0/0 gateway=192.168.251.254 scope=255 target-scope=10 \
routing-mark=link2 comment="Pacotes marcados redirecionados para o link2" \
disabled=no
/ ip firewall mangle
add chain=prerouting protocol=tcp dst-port=80 action=mark-routing new-routing-mark=link2 passthrough=yes \
comment="Portas redirecionada para o link2" disabled=no
add chain=prerouting protocol=tcp dst-port=443 action=mark-routing new-routing-mark=link2 passthrough=yes \
comment="" disabled=no
add chain=prerouting protocol=tcp dst-port=1863 action=mark-routing new-routing-mark=link2 passthrough=yes \
comment="" disabled=no
add chain=prerouting protocol=tcp dst-port=6891 action=mark-routing new-routing-mark=link2 passthrough=yes \
comment="" disabled=no
add chain=prerouting routing-mark=link2 action=mark-packet new-packet-mark=link2 passthrough=yes \
comment="Pacotes marcados do Link2" disabled=no
add chain=prerouting routing-mark=link2 action=mark-packet new-packet-mark=link1 passthrough=yes \
comment="Pacotes marcados do Link1" disabled=no
add chain=prerouting protocol=tcp dst-port=21 action=mark-routing new-routing-mark=link1 passthrough=yes \
comment="Portas redirecionada para o link1" disabled=no
add chain=prerouting protocol=tcp dst-port=22 action=mark-routing new-routing-mark=link1 passthrough=yes \
comment="" disabled=no
add chain=prerouting protocol=tcp dst-port=23 action=mark-routing new-routing-mark=link1 passthrough=yes \
comment="" disabled=no
add chain=prerouting protocol=tcp dst-port=25 action=mark-routing new-routing-mark=link1 passthrough=yes \
comment="" disabled=no
add chain=prerouting protocol=tcp dst-port=53 action=mark-routing new-routing-mark=link1 passthrough=yes \
comment="" disabled=no
add chain=prerouting protocol=tcp dst-port=110 action=mark-routing new-routing-mark=link1 passthrough=yes \
comment="" disabled=no
add chain=prerouting protocol=tcp dst-port=1080 action=mark-routing new-routing-mark=link1 passthrough=yes \
comment="" disabled=no
add chain=prerouting protocol=tcp dst-port=443 action=mark-routing new-routing-mark=link1 passthrough=yes \
comment="" disabled=no
add chain=prerouting protocol=tcp p2p=all-p2p action=mark-routing new-routing-mark=link1 passthrough=yes \
comment="p2p redirecionado link1" disabled=no