I actually designed a suit of power armor for LeeRoy's super soldiers. It's on stilts that end in large flat feet, they allow for movement on the softest terrain, despite the great weight of the equipment they carry.

[Img=http://th08.deviantart.net/fs70/PRE/i/2013/243/c/c/leeroy_s_power_armored_legionarie_by_leeroy_brightmane-d6kinju.png]

The perspective is wonk because I'm a shitty artist, but you get the idea.

Also, about the topic of weight.

Just because YOU can lift 100k tons, doesn't mean the GROUND can. If the weight is higher than what the ground can take then you're going to fucking sink. Never forget that when writing.