Well, a quick note:
There's a Schtick in Architects of the Flesh, under the various rebel groups, called Inspiration. Roll Leadership against a Difficulty 10 to give all friendly Mooks +1 to a single AV for one encounter.
Leadership is also useful for crowd control--I believe the Karate Cop unique Schtick uses it to be able to get cooperation from law-abiding citizens.
I've also used a couple "villain-only" Schticks in my campaigns:
Tactical Defense: Lets the NPC use Leadership as his base AV when making an Active Dodge. If the attack would've hit his normal Dodge AV, but misses because of this Schtick, one Mook drops instead (you can't use this if there are no Mooks left). All the faction-leaders possess this Schtick; it's also occasionally possessed by security chiefs, captains of the guard, or similar 'major flunkies'.
Cannon Fodder: After a hit has been rolled, the character can roll Leadership against the damage taken before Toughness and Armor are taken into consideration; if he succeeds, then for every Mook he sacrifices, he can lower the damage he himself suffers by 5. This is a one-shot reflexive action; two Schticks in Cannon Fodder lowers it to a 0-shot action.
Guards! Guards!: As a 3-shot action, the NPC can roll Leadership; a number of Mooks arrive equal to the roll's value; these Mooks will be able to act three shots after they arrive. This Schtick is normally only able to be used when the NPC is on his 'home base', or on a battlefield with almost unlimited troops nearby. However, ALL the 'big bads' (Boatman, Bonengal, The Unspoken Name, Gao Zhang) can use this ability anywhere in their Home Juncture (it's good to be the King), or within their Netherworld bases; within the home Juncture, they gain a +10 bonus to the roll. Likewise, Potempkin, the Four Monarchs and (wassisname, the head of the Hand) can all use this anywhere in their respective 'home turf' in the Netherworld.
Obviously, an NPC with all three schticks is VERY tough to drop, even if they, themselves, aren't particularly dangerous. The room just keeps flooding with nameless grunts, security goons, killbots or whatever the specific mook attached to the guy are, and you can't get a shot at him unless the mooks are swept clean first.