I'm pretty sure something similar has been suggested before, it's essentially the opposite of what a character centred around Lightning Punches would be:
- fist weapon/unarmed attacks ignore mechanical threshold when attacking organic targets (hammer fists, duh);
- for each percent of total armor penalty above 50%, the percentage of mechanical resistance incurred by fist weapon/unarmed attacks is reduced by 0.5% (from 140% down to 100%, potentially removing the penetration penalty altogether; hammer fists, duh);
- minimum AP of a fist weapon/unarmed attack set to 10 (12/14/16 or whatever else would be appropriate, the idea being that a swing of a hammer fist is just too heavy to be meaningfully impacted by Dexterity, although with that it would perhaps make more sense for the attacks' AP to be directly set to a value that cannot be further modified);
- all of the above only applies when total armor penalty is above 50% and both weapon slots are occupied by fist weapons or literal fists (same way as Heavy Metal works, more-or-less).
