5 min will do fine. Wait until you have several flies ready and do them at the same time. You can probably do at least 4 or 5 flies in the open time of the epoxy. Just have everything laid out and ready. I use toothpicks for applying small amount like you would need here.That way I don't have to worry about cleaning the bodkin I just toss them if they get to messy. It may only be seconds your saving but consider that 10 seconds cleaning epoxy off your bodkin after every fly can take a min off your 5 min set time. Also have some kind of foam ready to dry them in. I use the green floral foam, but anything thats easy to poke the hooks in to hold them will work. Ultimately a motorized dryer is desired, but for this kind of epoxy work it's not that big of deal.