THe reason why people did the brayflox strat as it was called was because of the fourth mortal revolution in conjuction with the nisi and as previously stated, it was a dps gain over doing it right.
The fourth mortal rev hit for 16500 back then which was 4000 more hp than what everyone outside of tanks had. In fact in the world first clear video here
https://www.youtube.com/watch?v=iewfOmHjwYU you can see the scholar using a vitality pot to survive the hit since they had the nisi debuff which was ticking down as well during the hit.
The second was how you actually did the mech. When the bombs came up, when you entered one of the bombs, it gave you a vuln up and got rid of your debuff. You had to make sure one other person had the debuff before doing the bombs, and then touch that person again to keep the buff floating while they get their bomb instead. Like everyone else said, it was a dps gain to do the brayflox strat with 9 deaths instead of doing it right.
That's why putting the rez behind a cd is a bad idea because should it ever come back to that again, it can't be abused. Not like that it will since the developers seem to be quite aware of how badly A4S was designed.
Again like I said, the swiftcast I'm good with but not everything else.