I flew and LCA'd on the UAL 767 for a long time.
Here's my advice:
If you want to use the brakes do so and don't worry one bit about the temps. Normally the turns are long enough for the cooling and it's a pretty simple thing (unlike the old steel brakes on guppies and three holers which would overheat the tires and blow the fuse plugs).
The whole idea of carbon "hot" = good or better is a "who cares" item. Use em if you need em because that is why they are there.
If you get worried about brake temps then the hesitation when they are needed may be a fatal one.