loading weapons with toxins as nerve agents seems reasonable ( curarae, ricin, hycosine, strychnus ( brucine would be my nerve agent of choice) or many other very toxic substances -the Vietcong stored some munitions in cadavers for example,poison arrow frog we all know ) but using combatants seems to be a very long haul investment in a medium that would be most effective only as a last resort in intense hand to hand combat.Ill have a hunt through my texts but this really is a new one - ..I vote poisoned weapons! Arsenic would fit the bill as a poison which can be "tolerated" if ingested steadily, but id rather kill someone from a safe distance with a pilum (or ballista best of all) rather than bite them.