i'm sure most of you have something like this: have one character with foe: hp critical = steal and another character with foe: hp critical = poach. you'll end up getting at least 2 items from any given enemy 90% of the time. combine these gambits with thief gloves and/or grimores and money is literally no problem, ever. just make sure to disable the gambits during boss battles and such...

i haven't really messed with gambits outside of the ally: any -> esuna and restorative spells

i'm working on a gambit involving the balance spell, reverse, and poison/sap. i'll post it up if it turns out to be worthwhile, tho i'm sure some nerd on the gamefaqs boards has beat me to it :\