I defiantly like the idea of keeping discounted salary platers on D and in net, and keeping the big dollars for the forwards, it's just in this situation I don't see how it fits.
I like Lindback a lot, but I don't know how he will be able to hold up getting significantly more games than he did in Nashville. I also feel like Garon is a solid number two, and should be good if they split the starts evenly, which would of course hurt Lindback's value. If the risk pays off it would be awesome, I just thing there's a bit too much risk here to make it worth while.
If you drop Rinne you might not be able to get him back, if you stand pat for the time being, I feel like Lindback could still be a free agent, giving you time to address the situation during the season. Not sure how long Varlamov will last on free agents though, and he's a guy I'd be much more inclined to pick up.