Sweeper,
I will use a backfist when my hand is across my centerline near my opposite rib cage. So if my right hand is positioned by my left ribs, say checking on a vertical punch with the left, I'll use a backfist so that my hand can roll and I can pull with my lat and anchor my elbow. I'm not sure if you are in EPAK, but if you are then Alternating Maces is a prime example of this move. I use it from a forward bow to a neutral. Hope this helps.
Respectfully,
Mace
I will use a backfist when my hand is across my centerline near my opposite rib cage. So if my right hand is positioned by my left ribs, say checking on a vertical punch with the left, I'll use a backfist so that my hand can roll and I can pull with my lat and anchor my elbow. I'm not sure if you are in EPAK, but if you are then Alternating Maces is a prime example of this move. I use it from a forward bow to a neutral. Hope this helps.
Respectfully,
Mace