The following is an excellent stealing Gambit setup. To have a character steal from all enemies without the dreaded "repeat steal" that plagues most conventional steal Gambit setups, try the following. With this setup, your thief will run around stealing from all enemies in the immediate area, while the other secondary will run around dealing damage to all enemies in the area. The thief will stop stealing once the other secondary has knocked all foes below 100%.
The team of three will then focus on and kill all enemies one at a time. Typically most enemies will be stolen from, but only once instead of repeatedly. It works perfectly on hordes as big as ten foes strong.
Include these gambits in your party leader's list: Foe: Party Leader's Target / Attack Foe: Nearest Visible / Attack
Include these in a secondary character's list (preferably a melee fighter): Foe: HP=100% / Steal Foe: Party Leader's Target / Attack Foe: Nearest Visible / Attack
Include these in the other secondary character's list: Foe: HP=100% / Attack Foe: Party Leader's Target / Attack Foe: Nearest Visible / Attack