Tyres for puncture resistance for mountain biking on rocky dry terrain (folding & lightweight) I need a tyre that is really durable, puncture resistance, folding, lightweight and good for rocky (sometimes loose) and dry terrain. I work as a guide in Georgia (Caucasus) and my tyres wear out too quickly.
I really like some of the WTB tires.  Specifically the Bronson and the Weirwolf.  It's tough to find a tire that's going to do it all, but I think WTB is a good mix between weight and durability.  I also really like the traction of those two tires in a lot of varying conditions.

When you say "they wear out too quickly" how quickly are we talking?  How many miles/rides/weeks...

Another thing to consider, if you are riding tubeless (or willing to do the conversion) I have had really good luck with Stan's sealant to keep punctures to a minimum. 

Also, are the tires wearing out due to treadwear, punctures, sidewall tears?  Those two tires are a really good balance all around but if you have specific concerns/issues, you might get some better recommendations.