I'm not on the 76T but I have been watching the flying it does. For February it is doing five trips. LHR 3 day, LIM 3 day, FRA 4 day, EZE 4 day and SCL 4 day. As an FO there are those same trips as IRO/bunkie (excluding Lima).
The good news is that is there is very little open time and it's pretty easy to watch the five flights you need to cover. The bad news is that you could be shipped off to another base to cover open 76T flying.
Judging by the hours flown by the reserve up until today (11th), it's all over the place. One guy at 50 hours (showing aggressive pick up) and another with zero hours and everyone else somewhere in the middle. I hope that helps.