Different monit settings for different gateways

[Isabella Borgward]

Two routers set up in HA, two WANS /29 and /30. Standby router cannot use gateway on /30 as there aren't enough IPs, so Monit constantly complains about it being down.
Can I get Monit to ignore the /30 WAN? So long as at least one WAN works, that's "good enough".