It sounds like you still get a fairly large amount at that pump.
If you are cutting down your pumping time I would guess you should just pump for comfort and not empty at each pump.
When I weaned I took it really slow and weaned over a period of one month. I was in no hurry, so I extended the gap between pumps gradually and always emptied at each pump.
"Life is what happens, while you are busy making plans."~ John Lennon ~
Luckily right before I started to weat