What I do is get 3 eggs, start a Power, cycle in front, I fill up on eggs before the power ends. Usually 3-4 eggs hatch. I then fly to check the IV, mark the IV, box if 5+, release if 4-. Go back, and start the cycle again. It's slower than other methods but allows me to stay on top of the IV. Of course I swap the mother if if meets the Ability, Gender (obviously), and has more IV and/or a better spread.
On a side note, I just looked up all Pokémon available in Friend Safaris to catch them all. I constantly add new people and remove others. I don't want to miss anything by removing people. I am missing a lot, this is going to take awhile and I think I'm missing a few Safaris.