Here is a great workout we made that is a simple circuit on paper, but packs a punch as you start to push yourself through the exercises and max rep sets.
But this is a combination of both with no set parameters for your totals. Just do what you are able to do:
Full body Circuit
Repeat 5 times (Goals)
Run 1/2 mile (3-4 minutes) Max pullups (100 no kipping) Max Pushups (200) Max Squats (40 pounds*) (200) Max Push Press (40 pounds*) (100) Max Situps/Crunches (40 pounds*) (200) (* = sand bag or weight) Limit your sets to 1-2 minutes and see if you can reach the above repetitions.
Instead of worrying about 100, 200, 300 total repetitions of various exercise -- What can you get done in SIX SETS?
Keep track of the totals and, if it works for you, try it every other week to mark your muscle stamina progress.