Dealing with multiple build completion triggers

I have a build task with multiple build completion triggers, sometimes as many as 20. Often, many of these will get triggered over a short period of time. This causes a lot of unnecessary builds to occur, as I would really only like to trigger the build once all dependent builds complete.

What is the correct way to implement this behavior?

I wished there was a way to say "When triggered, check all your other build completion triggers and only begin building when all of them that are currently pointing to running builds complete".

Alternatively, simply a quiet period for build completion triggers would be wonderful.