Maintenance for the week of September 29:
• [IN PROGRESS] Xbox: NA and EU megaservers for patch maintenance – October 1, 8:00 UTC (4:00AM EDT) - 16:00 UTC (12:00PM EDT)
• [IN PROGRESS] PlayStation®: NA and EU megaservers for patch maintenance – October 1, 8:00 UTC (4:00AM EDT) - 16:00 UTC (12:00PM EDT)
The list that I've been referencing is this one. The author has been doing a good job of keeping it up to date.
In general, if a set has no condition (other than the number of set pieces) associated with it, it will always work. If it does have a condition, then you'll need to look at the list I sent above or the original patch notes.