Maybe try /shout Lfg Garuda HM?

Why would you ever use the duty finder for anything past AK or Ifrit?

In Rev's Toll there are always multiple ppl shouting for Garuda and just about everything else. Answer a LFM shout or grab any other ppl that are LFG. Not that hard. The time it takes to grab ppl on your own server is usually faster than the DF. And on the plus side when you are in a group of ppl from your own server they tend to at least act a little more mature.