Infused sea wyrm boots with spikes will deal more damage than metal boots with spikes. Id put a serrated tichrome blade on your armor, with two tichrome spikes, and use tichrome spikes on your boots (with soft foam). Not sure if the boots will prohibit you from getting lightning punches, though; sea wyrm is pretty heavy. Since super steel can get to such high qualities, you will want to max your mechanics skill all the way.
Oh, and you can get heavyweight even if your armor penalty isnt that high; its still extra crit damage. You'll be very tight on feats, however.
Pic attached is probably the best non-psi brawler build you can make. It's intended for leather gloves however.