The obvious answer is that you should sew several rare earth magnets into the lining of your pants at the thigh, knee, and shin, along with your boots. Then, use only metal mags, and do mag changes while standing on one foot like a flamingo, or while walking with exaggerated high steps. With three full rings around each leg, retaining your mags, car keys, and edc carry knife will never again be an issue. Might also help your circulation and give you that extra boost of energy you need to win the fight.

Might need to switch to a compass that isn't affected by magnets though. Good luck!