Hills volume

My tempo volume will start with around 2500 per session and will progress to 3000m per session exepct once a week when I do big circuit that is quite demanding itself.

How do you think I should achieve such high volumes without too many starts? The problem is that in the last GPP when doing 40’s I was already quite winded coming to the last set. Isn’t it the same as speed work where you have to be fresh to perform fast enough?

You think I should be doing sth like 4x3x30m + 1x3x20m?

I just realised I did a mistake. In the first week the volume is 350m per session:
2x5x20m
1x5x30m