I totally agree with Gerd50's comments!
I have posted about this elsewhere on this forum - that anyone wanting to direct LMDE at Debian Stable will only be able to do so by using the early iso's in Gerd50's post. I can think of a thousand medieval tortures I would rather go through before I would try to "downgrade" over 1000 packages in the current release to Debian Stable.
You have two choices really; use the aforementioned early iso's (and keep a copy for any re-installs) or you could install Debian Stable direct and try to "Mintify" it yourself by getting some Mint themes etc.
LMDE (any desktop) = Debian Testing base!! Anything else is your own hybrid.
Having said that, Clem et al have gone to great lengths ( as they always do) to satisfy the user base assumption of stability in Mint releases. I would think installing from the new release of LMDE and pointing your repos at "latest" alternatives is as stable a Debian Testing system as you could want without isolating yourself from ongoing LMDE development. This is a much better option going forward IMHO.
Personally, I stay aimed at "testing" because I have always believed monthly updates is too long a period between updates for a "rolling release". I also have a test install aimed at "Unstable/Sid". Neither have had breakages that were not readily fixed without re-install.
Life isn't about waiting for the storm to pass...
it's about learning to dance in the rain.