One more mwan3 question, load balancing and failover

When I was using pfsense I had to create a load balance group and 2 failover groups. The load balance group had both lines equal priority and the failovers had one lower priority and vice versa.

Do I need to do something similar with openwrt? I have a functioning load balance setup but not sure what happens if a line goes down. Family is tee’d up that the nets been up and down all afternoon so not brave enough to pull one and test lol.

In a load balance policy, if one wan goes down the other wan will take all the load.