Looking to direct users to a server based upon URI

Since you're not doing too many matches against the data, why not use switch instead?

when HTTP_REQUEST {
 set default_pool [LB::server pool]
 if { [string tolower [HTTP::uri]] starts_with "/httm_" } {
  switch [string tolower [string range $test 6 8] ] {
   "111" -
   "254" -
   "115" -
   "114" -
   "860" -
   "103" {
     pool qml01.80
   }
   "101" -
   "219" -
   "104" -
   "759" -
   "102" -
   "725" {
     pool qml02.80
   } 
   "107" -
   "c27" -
   "119" -
   "c28" -
   "d01" -
   "633" {
     pool qml03.80
   }
   default {
     pool $default_pool
   }
  }
 } else {
  pool $default_pool
 }
}

This will switch pools based on the 3 characters in URIs that begin with "/httm_" while setting to the default pool for everything else.