Completely ignored this last time, will completely ignore it again.

A note for those hunting the Pegasus mount, it's not too hard to farm in the Diadem with a buddy. You simply go into the Trial of the Matron at off-peak times when it's definitely empty, spend 20 mins tops gathering Darksteel, Mythril, Spruce and other decent mats to sell. While doing this grab all the Buried Coffers in the open world. After your gathering objective, explore every cave/atherial gap, there's generally one chest in each. You can easily get 40-50 brass spoils in one run total (halved if you split with your friend).
You then trade the 10 steel spoils from the objective for 30-90 HW nuggets/lumber for even more profit. I got the mount and pet a while back this way.