Although the triangle may be the 'ideal' profile, it is a little impractical on such a short flight. We tend to have a fairly 'sterile' cockpit (chit chat ok, but no other paperwork etc) up to top of climb and from top of descent. This is to try to prevent level busts due to pilots attention not being completely on what the aircraft is actually doing.
What wee tend to do is try to get about 80nms of 'cruise', which obviously wouldn't possible on a 100nm sector otherwise we would only cruise at about 3000'!!! But that is the idea, so that we get a little bit of time for setting up the aids, getting an updated ATIS, completeing bug card and the like before we start descending.
PP