GTM to resolve WWW proxies for clients - LTM required?

Thanks for replying. Let us presume we only need DNS service for the clients to reach the upstream proxies and we have a working GTM WIP resolving to a pool of LTM VS. Apologies but I need to ask a config question at this point as could not find anything to suggest what I should do - to not use LTM, I am what IP address should be used on the GSLB server and GSLB VS resource – can they match the proxy destination IP and port? Is this the correct way to use GTM only if you just want to resolve to an IP? The flow for client to one proxy then would be: Client --> proxy.pac --> proxy=proxy1.acme.uk --> GTM WIP --> wip proxy1.acme.uk --> GTM resolve WIP proxy1.acme.uk --> GSLB server_VS (matching proxy IP and port 8080) For the above, the WIP pool would contain the GSLB server_VS for each of the three proxies (one in each of the three data centers) and the pool could have persistence enabled such as CARP to keep clients to one proxy if available? Again, thanks for any help