They will all work, single or double. Get em sharp and shoot em. As Terry said, these been making big holes since day one.
Ashby's studies and all of the discussions surrounding it looked at optimizing things for BIG game.
Yes, the arrow will fly well no matter the feather side. Yes, the broadhead will penetrate a deer well no matter the match up. You only need maybe 12" give or take to go thru most deer.
If you are trying to optimize, get the most out of it, match the feather spin to the spin the broadhead will induce so there is no energy loss, especially at the critical part where a large bone might be encountered.
By theory, a narrow head will induce a spin easier because of the geometry of the head and because there is less resisting force from those wide wings. In a deer..... just do it !
I think......
SHoot straight.
ChuckC