Royal Chak Ichor
TD meta is a little like the dragons stand meta. You need to be there early to catch the one map actually doing it. Just look in the lfg 10 minutes before it starts and look for an organised map or an event farm (just post in map chat about meta and people usually tag up).
If, for some reason, there is nothing in LFG post your own simply saying “meta map need comms”. i’m sure there will be people like you looking for a meta map.
It might also help if ANet would fix the Tarir exploit so other activities are relatively more attractive. Regardless, TD meta gives horrible rewards, has a much higher chance of failure, and the rewards are all-or-nothing. Even without the multi-map exploit, TD loot is still far worse than a Tarir assault completion.
Poor design. It’s time to fix it, ANet. You’re letting some of the best content in the expansion go to waste here!