I tried hefting a couple of days ago in my out-apiary. I haven't felt it was necessary before. Hives C and D seem well supplied. Hive B is rather light, but it was always a smaller colony.
A bee got cross when I hefted hive D. It tried to attack me but was whisked away by the strong wind of Storm Barbara. Windy.
Hive A is unlikely to need any hefting as it's massive. I haven't tried Hive E, but I ought to. It's the most likely to be in need of help.