I first heard the relationship as "one on the foot equals four on the back." four- five - whatever - I think the statement is substantially correct.

Over the years I have been comfortable in lighter and lighter boots/shoes. I pay a lot of attention to the tread of the gear and now I favor what are often sold as "approach shoes." I find them light, sure footed, and very comfortable on 10 mile +/- days, on or off of trail. I also have a pair of Vasque Sundowners for really rough situations or snow; I wear them occasionally.

I long ago gave up on the 9" or so high combat style foot gear, other than for construction or wild land fire fighting. That still happens, so I do have two pairs, one with steel toes and one without. I think you will find your calf muscles will do better in lower shoes.