You can easily run CE in 20-25 minutes. Nightfalls 10-15 minutes each. Weekly heroics also 10-15 minutes each. So we're at what 1 hour and 50 minutes if you take the longest time on each of those with one PoE left to go, which those also take 20 minutes so you'd be over on the 2 hour time some weeks but not by much. Now there's some weeks you can run the nightfalls and weekly heroics in less than 10 minutes each, it all depends on which strike it is and the modifiers you get for it.