Not sure if this has been brought up or highlighted, but the feast pvp meta is vastly different on JP servers. I would say this as a participant on season 5 Elemental and one who managed to secure a spot in the top 100 that some consideration should be given to how its done on JP. Twitch streamer Bountiful harvest and panke 0219 on youtube (who organises a cup/tourney on jp) are great ones to find video examples.

On JP, everything revolves around the countdown of 5 (initiated by the melee dps) using the markers and macro. During countdown numerous things can occur, tanks prepare to stun, dps ready their hardest hitting burst within the shortest GCD span and depending on the target, the tanks/dps/healers adjust their cc,abilities to fit the situation. Similarly, the opponents would be trying to perform the same and you have to rely on the defensive skill and awareness of the players to prevent a death (e.g. predict an enemy burst, stun the melee dps/ use quick target macros etc). I find the value lies more on the team rather than the individual here compared to what I have heard on NA.

I maybe wrong about how things work and perhaps high level play on NA is similar, could someone please share their exp?