TCL error - no such pool

You're going to run into the same problem you had previously using LB::server pool and LB::server port in the HTTP_REQUEST event. The most important thing to consider is that the HTTP_REQUEST event is triggered BEFORE the LB_SELECTED event, so while the values may be there sometimes (as you've discovered), it won't always be there. If you truly need to use LB::server commands in an HTTP_REQUEST event, try moving the whole thing to HTTP_REQUEST_SEND or HTTP_REQUEST_RELEASE instead.

Also, while you're doing HTTP and HTTPS on the outside, the pool members should all still be port 80, so you could simply hard code the port in the LB::status event.