I have a 50's book written by a team led by a WW2 GHQ officer. He wrote after the war that soldiers must never be weighed down again.
His unrealistic demand was for a 10 kg weight limit.

Then he went on to devise what equipment would be necessary and I guessed that incl. clothes at abut 20 kg and it was just the basic personal equipment.

It's a choice between the devil and the deep blue sea. There's not much to be gained by optimisation, and playing around with a mix of light and heavy infantry (weight-wise) isn't going to succeed due to political and bureaucratic dynamics.


In case of doubt, delegate the decision to company level (with the power to delegate it further) and never criticise your well-trained company leaders for a wrong load of their troops.