Thanks to a useful comment from retholey, I found an error in the lists today. Edge of Ruin apparently initially showed with a max weapon dps of 856. This was updated to 892 (which it always did dps wise). Unfortunately I caught the former score when I did the list.
Edge of Ruin now scores more and is the Best in slot weapon pre-raid. Its quite close to the Marrowstrike, so don’t go throwing all those polearms out of the window just yet. And if you do, check you don’t hit anyone standing there!