I personally am not one to purchase morale and power potions in the LOTRO Store. They seem to be easy to obtain in game from skirmish vendors or reputation barterers (also note that Goldenstar is a scholar).
Ketani tells me the store morale and power potions are nice for raiding and I’ll trust her judgement on those. They have a shorter cool down that is not shared with crafted potions so she can use both in a fight.
If you are of the same thinking as Ketani, then 50% off sale seems to be the time to pick some up!