A lighter more agile strategy is the way to go. It worked perfectly when the British paratroopers landed on top that Panzer Division at Arnhem.
Having spent very little time analyzing current and future weapon systems, countermeasures, battlefield tactics and etc. I have little to add to discussions of such, other than to mention if British paratroopers, landing Arnhem, had been equipped with the portable weapon systems in existence today, things might have turned out different.