That's all well and good for standard vehicles. However, on heavier vehicles like a DP, the lug nuts are tightened to 450 ft. lbs. so you would need something like torque multiplier or long extension on the breaker bar to break them loose. The trick then being to get them all torqued up again to 450 Ft. lbs. when reinstalling the wheel is where a torque multiplier might proove to be useful.
Having said that...The truck tire place where I get my tires for the DP actually uses a long handled click style torque wrench. The handle is at least 4 ft. long and very easily gets the lugs up to the 450 ft. lbs. They even let me try it and I was surprised at how easy it was. They said that they trusted the accuracy of the click type torque wrench over the torque multiplier. The only problem is that wrench was very expensive (several hundred dollars I believe they said).