From my readings, and understandings, this is a classic case of sciences favorite sentance "...but more research is needed".
If we had some solid axioms we could perhaps make some conclusions. The biggest problem is what causes tolerance? Some people argue receptor downregulation, some people say neurotransmitter loss, some toxicity. My personal favorite is transporter downregulation.
If we were to argue transporter downregulation, then tianeptine isn't going to help, because it also causes that.
If we were going to argue toxicity or neurotransmitter loss, then it's not going to help again.
But, if we argue receptor downregulation, then on the surface tianeptine might help, BUT, coupled with tianeptine-mediated transporter downregulation, its probably going to be giving with one hand, and taking away with the other.