>>45453328Doesn't have any physical-boosting moves (unless you want to use curse which is a terrible idea), so a fully physical zam would have to go the all-out-attacker route: drain punch, knock off, iron tail, thunder punch, ice punch, zen headbutt. Probably LO. Decent enough coverage for a psychic, but not nearly enough power in this day and age, all moves being 80 power or less.
A mixed set would exploit zam's strengths better: psychic for a strong STAB, knock off for opposing psychics or ghosts, drain punch for chansey/blissey. But at that point you might be better off just going back to a fully special set instead of splitting EVs between Atk and SpA, not to mention magic guard is better in such a frail mon that can't afford boots if it wants to hit hard enough.