Main Info is here http://lodestone.finalfantasyxiv.com/pl/topics/detail?id=29c4026362c3cb8add98892a8b84d9ed371bd789
I have yet to successfully complete one
But another thread few days ago mentioned an limitation not stated in that article
Battle Regiment needs to be Queued up in a very small window. (Possibly within the same time span as FF11 SCs)
Otherwise it will not work.
So the first person click battle Regiment , then queue his action - a tone will play and a red circle thingy aura will be around him.
Upon seeing this the 2nd person need to immediately click battle Regiment and queue his actions
then immediately execute
Unfortunately thus far I have not had one party member who can follow those instructions. Either that or I am doing it wrong XD Which is very possible.
FFXIV: Karamethien Seraphus
Still a Seraph Samurai Wanna Be
Fishing AF - Complete, SAM AF - Complete, RNG Af - Complete, RDM AF - 1/6