I'll go with my NY tactic .... blast out the blocks then settle in with whichever group I land with, trying to conserve energy. Attack the hill hard, then over the top just find a group again to sit in, trying not to work too hard. The hardest part is trying not to chase people up the climbs when you've been riding with them in a group on the flats.I stopped with the lead group for the first 18 miles then started to drop back, the hills even though not very long there are some steep bits
TdZ 6 is up the Alpe according to a post on Zwift forums
At least now I know to expect 80 minutes or so, rather than 60 mins, so I can try and pace myself accordingly ....... oh, who am I kidding, I'll just work myself into the group and bugger pacing!!!