For the life of me, I can't figure out how BR works. My friend and I spend a short while trying to stack an Archer WS and a Lancer WS (Puncture and something), but -nothing- happened. I mean, not only do they not create a special additional effect, the WSs themselves won't even fire.
We click the BR button to the left of the hotkey. I add Puncture to the list (and the meter appears above the mob's HP meter). He adds his Lancer WS, and the meter appears.
Then the both of us start randomly doing some weird charging (kinda like Boosting in XI) but nothing happens. The two WS meters gradually depletes, then at about 90% left it just jumps back up to 100%.
We get the message "Battle Regimen failed because more than one player tried to initiate it," no matter if ONE person tries to begin it or both of us tries to click it.
After a while we got tired and just went back to the oldschool stomping on cute little animals.