Feed as much as they will eat in 5 minutes, early in the day and in the later afternoon. When they reach the desired size and weight (without being obese), cut back to as much as they will eat in 5 minutes once a day.
My baby panthers have unlimited food in their cages, so I don't know how much they eat, but they sure poop a lot. I would guess over 10-15 food items a day as babies (3 months)......this is crickets, roaches, fruit flies, and bean weevils. Along with wild collected aphids, caterpillars, and sow bugs.
My adult males eat between 6-12 items per day. Usually more around 6-8. These are larger dubia roaches, adult Turkestan roaches, large silkworms, silk moths, and any nice big wild bugs I find (grubs, grasshoppers, moths).
My female really varies, depending if she is gravid. Some days she only eats 2 items, a lot of days she eats nothing, and other days she will eat 10 items.