I got around to playing Shaka and using Impis, I realized they are much better than I realized. An Impi is like a Chariot with Mobility (-1 movement cost so can basically cover 2 tiles over any terrain except a forested hill) that starts with Combat I thanks to Agg. Ikhanda (Barracks) is cheap also thanks to the Agg trait of Shaka opening up Shock/Cover promotions. If you have Copper, you can really terrorize your enemies. Axes kill Impis with impunity, but you can always pillage their Copper if they have it. Impis are expert pillagers, worker stealers, and passable city attackers with Cover and 2-3 in enemy territory are often enough to cause major damage. How do forumers use this UU?