47 Ancient Nord arrows and 2 level-ups of Archery.
Had to restart my sorry SOB playthrough because of Civil War bug caused by an old install of that Ultimate Follower Overhaul mod trainwreck. The save I was using was from 2017 so GO FIGURE.
Anyway, redoing the Companions quest and this is the first draugr crypt. No, I did not stack them that way, their master-crafted Bethesda AI lead them all to the same spot, form a que and politely wait their turn to get shot.
I THINK I was supposed to run flailing around the cell, not stand on a table. Oh, and dimwit Farkas didn't make it into the cell before the door closed and locked him out.