cob timer

[Cowsfly]

Im not sure if this is something that can be done but our raids run with 2/3 dirges and they overlap their cob because they cannot see the icon in their spell effects window showing when the other dirge's cob is down, prob works for pom too. Is there a way to set up a 3/2 way timer that flashes some kind of ui notice when the cob icon is flashing or after maybe a tell trigger.

what i would like to happen is

dirge 1 casts cob dirge 2 gets tell starting timer, or just have dirge 1 start a timer that auto sends dirge 2 a tell when to cast ( in other words a /pause command for a tell)

how ever many seconds later dirge 2 gets a pop up/tell saying to cob

dirge 2 casts cob ext..

I know you can do this with act im aware of that but one of the dirges over ridding cob uses act so im thinking its a bit easier to just get a tell reminding u to cast or a big pop up window that if you click will cancel what ur casting and cast cob.