Kronwall - Smith
Kronwall - Dekeyser
Kronwall - Ouellet
Kronwall-Smith was a surprisingly effective pairing. People have becomes so obsessed with having a puck-mover lining up against a defensive stay-at-home guy on every pairing that they forget how successful two puck-possession defenseman can be. Smith also seemed to focus a lot more when he was on the top pairing. He seemed to take his cues from Kronwall whereas with anyone else, he's kind of his own little island out there.
Kronwall-Dekeyser also looked good last year. But as another poster said, that is kind of putting all of our eggs in one basket. Dekeyser looked his best alongside Kronwall and that seemed to off-set the jump into having more consistent top-line competition.
Lastly, I'm throwing Kronwall-Ouellet out there as an option down the road if our defensive strengths don't get addressed. Its a lot to ask for Ouellet but I'm not so sure that it would be that much of a drop off from how Ericsson is playing right now. You can't ask this of Ouellet now, but if we make room for him full-time, and he plays another 20 NHL games admirably, I'd keep moving him up the chart. Strangely (or rather, sadly), he's looking like he could be our best puck-mover outside of Kronwall.
As for our defense as whole, I'm having a hard time differentiating between Quincey, Ericsson, Dekeyser, and Smith this year. They all play slightly different games, but in terms of performance, they're close enough to being a wash that I essentially consider them to be damn near interchangeable. As someone said earlier this season, there is such a huge drop-off from Kronwall that it doesn't really matter who our number 2 defenseman is. Its probably simply going to be a matter of chemistry with Kronwall if our defense is upgraded from within.