One idea I adopted from another builder was to spray foam the chimney shaped box that penetrates the attic between the ceiling and the roof. Ultimately the idea is to avoid problems later that can be extremely costly or painful to deal with. Discoloured or moldy drywall due to humidity and air leakage on the walls is a problem that I don't want to encounter. So thanks to whomever it was who had the idea to spray the skylight framing.
The spray foam is down all the way to the poly vapour barrier in the ceiling. This will reduce the likelihood of air leakage and condensation in the attic or inside the house being a problem, permanently. There are many shoddier ways to do this job but the chance of condensation problems during severe weather is not worth the risk.
And here is a similar photo angle with the loose fill insulation blown in. This approach should drastically reduce heat loss through the ceiling and have a very long service life with no upkeep concerns.