Only way for a combo like that to possibly work in duplicate is if you had a duplicate of every piece of the combo. Since there are no [2]-slotted shields, footgears, armors, or garments, it's impossible to do a combo more than once with any of them which require those gears.
If there are combos which only require headgear, weapon or accessory slots, you might be able to pull more than one instance of the same combo and have them stack, but I'm not 100% sure on that.