I have not thought of a scenario for double combos in our enterprise. However I have thought of several places where it would be useful to have combos on *yellow* or combos that could return yellow.

ie, go red if more than two servers in a cluster are yellow (solved this one by creatng a second, duplicate local test that just reports red when the original test reports yellow, used only for the combo test, not itself paged on)

OR I want to go yellow if two servers out of four in a cluster are yellow or red (haven't got a way to go yellow on a combo test)