For some answers, see Justin Patten’s Human Law Mediation. It took our firm–and me–a long time to figure it out: paying a hard-working mediator to deliver a reality check to all sides is the best settlement device out there. It stifles the testosterone for a few hours, and forces reflection. Helps your client rep/GC and you with your inevitable “Kool-Aid” problems*, too. If something can settle at all, a good mediator will get that done. It is well worth the money spent. If it still tries, you try a more efficient case.
*Believing and thinking for whatever reasons that your court case is better than it actually is.