Way of policy-based routing at the time of the Dual WAN

Hello, All

When following such a structure, I would like to the routing process to Azure side,
probably because you are using ECMP, routing to the Azure side fails to even.
図面1.jpg
Will you what should be in such a case of setting?

/ip route
add check-gateway=ping distance=5 dst-address=10.0.0.0/11 gateway=21ip routing-mark=\
    azure
add check-gateway=ping distance=1 gateway=gmobb-giga,21ip

/ip firewall nat
add chain=srcnat dst-address=10.0.0.0/8 out-interface=21ip src-address=192.168.122.0/24

/ip firewall mangle
add action=mark-routing chain=output dst-address=10.0.0.0/8 new-routing-mark=azure \
    passthrough=no

Best regards.