@ Blm, you can not cheese mechanics in E3S or E4S.., you than either die or kill someone..
(those fights especially E4S is hard enough as BLm...)

that said, the enrage is ok the way it is atm (need to execute the mechanics correctly + get as much uptime as possible)

... though some classes do contribute too little / could contribute overall more (nin, rdm and dnc), .. and others almost too much (mnk & pld), .. rebalancing is a bit needed