Been a long time since I have done garuda ex, probably not since i90 became useless. So I would also have no idea what you are talking about. I am on a smaller server and cannot even remember the last time I saw a garuda farm.

Probably shouldn't assume any strat in DF with that little communication, marking targets is kinda passive-aggressive and usually confuses people. Not everyone knows what your marks mean (or even acknowledges them), text before hand or go with the flow I would assume.