Auvitu has been fine, actually pretty darn solid for a bottom pairing guy. The problem all season has been the Klefbom-Benning pairing and recently, it's more due to Benning's issues than Klefbom.
If Benning sits like he should when Klefbom returns, you'll see the D zone play improve. It's a fire drill just about every time he's on the ice.
Auvitu has improved significantly as the season has gone on but still gets completely overwhelmed in his own zone at times.
Klefbom has improved as well from dumpster fire to not bad. Benning is a high event player at times but his overall game is significantly better than Auvitu and approximately as good as Klefbom recently.
In short your selling Benning short a bit and exaggerating Klefbom and Auvitu a bit.
Just out of curiosity do you conceded that Russell overall has been a bit better than all of those others? I would guess you have a preference for "puck movers" versus "grit".
Gryba has been a very solid 6/7 for us and been more bad than good.
We have a very solid and versatile group of defenseman. Until Klefbom comes back in don't see any changes to the group. Just reshuffling to keep competition good.
My preference will be:
Nurse Larsson
Sekera Russell
Davidson Benning
With Gryba and Auvitu rotated in periodically to keep everyone on thier toes.