When I talk about duct tape with a wound, I'm generally thinking of either (a) using it becuase it's around and steristrips aren't, (b) as a form a dressing tape that actually holds something in place, or (c) as big bandaid with gauze over the wound, checked at every pause (or few hours if stationary) or if it gets painful.

The only other way I use it on me is for hotspots that I catch before they turn into blisters. Put down a little bit of gauze, and then a patch of duct tape. Or if I'm wearing dress shoes (which always blister my ankles), put it on before hand under the socks. :P

What I will say is, sutures are technically a minor surgical procedure. Not hard, but neither is putting in an IV. If you know how. If you don't, I can think of several ways you could make the wound more interesting trying to stitch. (Too shallow and it tears, don't keep it sterile, et al) And I'm sorry, you just won't learn that from a book or webpage. Take the blasted course and practice, or use strips or staples.

Or pray, if that's your thing.