Hi wdoyle,
Just to give you feedback on what i did. So in my orginal pool i had 3 members. I then added a newer member to the same pool that only served up the maint. page BUT with a lower priority. The result is the 3 org. server always get used because they have a higher priority until all 3 are down. Then it will roll to my 4 server in the same pool. If your GTM (WIP) is reaching your LTM via iquery (VIP) and the 1st 3 servers fail it should still use the last 4th member since it's in the same pool. Attached is the link i used. response from The Bhattman on the top of the page.
https://devcentral.f5.com/Community/GroupDetails/tabid/1082223/asg/52/aft/1172236/showtab/groupforums/Default.aspx
BTW, Aaron, my post back in 2/14 worked for 80 and 443 traffic perfectly. Thanks again.