Simulation-wise, a longevity treatment can be groundbreaking. Imagine: 5000 years we try medicine, juju, surgery to keep the gooey mush we inhabit from falling apart for one more precious year. A Longevity drug like "juvenats" of "Warhammer 40000" can not only bring long life for officers but huge profits, a wealthier population,better population growth and massive happiness, expecially when you need that extra year to study or live or enjoy.
A more interesting asset could be combat stimulants. A fighter pilot hooked on some wild stimulants that don't destroy his mind when hes plugged off, or a pheromone spray to remove panic and fear could be nice. Come to think of it, you can mix chemicals and pheromones to drinking water, some tinfoil hatters say it happens.