That sounds standard to me. If the bud is "snap" dry, meaning when you bend a piece it snaps in two fairly easily then yes, 40min@220 should work well. I would only decarb longer/hotter if the bud was "wet". I think the last decarb I used on standard bud was 30 min @225, and I've seen others use a similar recipe.
I have noticed some people on this forum using higher/longer temps/times to get a different effect,
HERES AN EXAMPLE
So you can see that people have different recipes for decarbing as well and for good reasons.
Unfortunately I think the kief your friend pitched in was probably a waste if it wasn't decarbed (hopefully it wasn't that much?). Even though decarb recipes can differ from person to person, most will agree that decarbing IS necessary for a proper edible/tincture. However there is another side to this coin.
Other side to this coin: I don't see many people talking about (mostly cause it doesn't get you high), and that's using THCA and CBDA and other precursors to cannabinoids as medical benefits. Many people claim
Juicing to be medically beneficial.
Good talk.