What is the middleground between permatube and normal tubes? I've burst my third tyre in two months on my MTB, each time it's caused by something sharp penetrating my tyre at high speed ripping a big enough hole in the tube causing the slime to leak out rapidly followed by a struggle to maintain control of the bike.

So I've considered permatubes, but read that they add a lot of weight to the MTB and are rock hard, so the ride will be extra hard.

Is there some sort of middle ground? Permatubes are rock hard, but will never put me in a position where I have to walk the last 15km of a 40km trail, normal tubes I can inflate / deflate depending on whether I cycle on road or offroad, but it seems slime is not enough.

Any suggestions?
Permutube are not good to ride on  

Middle ground is a heavier puncture resistant tire if you are running racing tires  

Spare tubeS, tire patch, tube patches, and a pump.   

Tubeless has a lower risk of failure but field repair is harder (you can put a tube in a tubeless).