Yeah I was thinking on similar lines Aethling, Allomantic sabotage. Also rioting everyones hunger to go through supplies, soothing the alertness of sentries so you can slip in more spies, rioting the lonliness of troops could cause some serious homesickness, confusion in engineers to prevent any ideas, same with the strategists, or their anger, so they continually argue. Soothe people so they become more comfortable around you, easier to find out any secrets or plans.
Emotional allomancy is the best.