How to eat a spruce tree
I have many years of BBQ experience smoking briskets.
I would not recommend spruce as a cooking/smoke wood for brisket or for anything.
It will not taste very well. Too much creosote.
Use oak, hickory, mesquite or any fruit or nut wood.
If you are cooking the brisket via another heat source and using the spruce needles as a flavoring agent, that may work. Not very appealing to me, but.