Since there are hyper triggers or conflicting waits, how can i display text after text in a number of seconds and other things in a cutscene?
Countdown timers, or death counters, or creating a unit then ordering it to move to another place, and use that as a timer.
For cutscense, I wouldn't use death counters or physical waits. There's just too many triggers to do. I would save the waits for the cutscenes and use death counters and such for other triggers.
Death counters may not be so bad. Just make sure to have it run for 1 player only (so adding doesn't get multiplied with more than 1 player). After that, knowing about every 12 deaths = 1 second, you should be able to time actions pretty well.
I would use transmission, i don't think those waits get messed up.