In a ranger always use first. Unless you are stuck in the snow mud sometimes being in a higher gear and lugging the engine will give you that grip to get out. An example I had my big truck stuck in the ice in Queens last week. I was just spining wheels in first and reverse so I used 6th and high range reverse and was able to get myself out.
You are loading the engine and your computer's AFR response will go to crap. Just learn how to drive in first with a soft foot. You can also make it knock
Not if it's a once in a blue moon ocurance. I do agree you'll tare the truck up pretty good if you take off in 2nd plus in a ranger on a normal basis