How to config BalancerObject in case I have a bunch of outbound nodes?

[IOsetting]

I read the document but didn't really get the idea of how to use it.
In my case I have 5 ~ 10 vmess nodes that connected to different proxies, I want to use them all -- as a load balancer or master/slave in case the main node fails.
This looks like the url-test feature of Clash, I am not sure if it is doable in v2ray?

Thanks!