Multiple monitors to one pool

Hi would like to check if this instance has been resolved?

We have a similar scenario to this one.

For our case we actually need to check 3 diff hosts for 1 node. so we created a custom http monitor with the below send and receive string.

Send String: GET /alive.png HTTP/1.1\r\nHost:domain1.com\r\n\r\n

Receive String: HTTP/1.1 200 OK

This is currently working for domain1.com.

But we have 3 diff host/url (domain1-3.com) pointing to the same VIP and nodes.

so we need to have different "Send string" for each of the host/url. So if user access either domain1 2 or 3. F5 should check the heartbeat through /alive.png for each of the host/url.

can this be done without using an external monitor? instead just create 3 different health monitor and apply it on the same pool? if yes, what will be the behaviour of the monitor?

Thanks in advance.