Fastest way home?

The last day at Montague was spectacular, probably the best soaring day I have ever seen! After flying 7 assigned turn-points in an 8-turn (3hr) MAT, I was 45 miles out with 3500' over MC-3 glide home and the SN-10 said I would be 4 minutes over the 3 hr minimum time. My stats page told me I was doing 70 mph so far after cruising 80 knots all day long.

Question: Is it faster to raise the MC to 4 or 5 and come home at 90'ish (monitoring time and altitude required), probably bringing my time remaining down to zero..............Or should I use my excess altitude to select another turn-point adding 10 more miles to the total distance and continue to cruise at 80 and be overtime about 13 minutes?

I did the latter and got 73.5 mph (236 miles), but I have a sneaking feeling I should have done the former.
JJ