It depends, as you alluded to, where we are in terms of power, capacity, hills, sleds, flats, and so on as well as how much 7 on 7 (skill work) I have to account for.
In general, however, the highest volume we performed was on the hill (ala Charlie’s GPP) in going 10yd x 10, 20yd x 10, 30yd x 10; which we handled very well.
As the summer progresses the volume of 7 on 7 increases so I reduce the volume of the sprint drills accordingly; although we can increase it during alactic capacity simply because the intensity is less (not so dissimilar from the large volumes associated with a sprinters special endurance sessions)