As for specific warnings about the interrupts, isn't the castbars enough? Since you should always be on your target anyway.
Um no, an audio warning for an interrupt where 1 tick of it going off will wipe the raid is pretty damn useful. DBM has this feature for every major interrupt, it's a good feature, a useful feature, argue if you wish but you are just being stubborn. Anyway my code worked perfectly so if anyone else wants to use it feel free.