How to make Hudson promote a build after the completion of chained downstream jobs?

Question

I'm using the Hudson promoted build plugin to try an automatic deploy if all of the maven projects are good.

My setup is similar to the following

Hudson job creates a version control tag and then triggers downstream builds of projects A and B. A triggers a downstream project Z.

I currently have the promoted builds plugin listening for success of A,B,Z. But no promotion ever happens.

I currently don't have the project triggering all 3 since there is no point in building Z before A.

Any ideas?