Well I do a few more km than you Mr T, see I might do 70,000km in 2 years.. So to wear down a set of shocks in 18months I'm not too happy with that..
Bear in mind my stock front shocks which I've only just replaced(202,000km) lasted pretty well. They couldn't of been anymore worn out though as they only got a 2 out of 10 rating while my 18month old rears got a 6 out of 10 rating. 5 out of 10 is a pass by the Pedders Suspension 19pt test/checkup.
I sent KYB an email a few hours ago just stating the situation and asking if they would do a custom set or more heavy duty set. If they would last 100,000km I'd be happy with that. I know King's can do custom springs so I thought I'd ask...
I seem to find myself offroad almost every weekend aswell.