by Paul Cook - It needed a second half defensive masterclass to cement victory but an early blitzkrieg from table-topping Melbourne Rising proved enough for them to down Canberra Vikings 34-13 at AAMI Park last night. The competition pacesetters were at their devastating best in the opening quarter, building a 26-0 lead in only 25 minutes, in a manner that suggested it would be a long night for the Vikings. But a try to Robbie Coleman on the half hour reversed the momentum and saw the visitors dominate for large periods of the remainder of the match, only to be thwarted by Rising’s well drilled rearguard. A second try 10 minutes from time had the Vikings within 13pts but a grandstand finish was denied when replacement Luke Burgess went over for Melbourne’s fifth five-pointer to confirm their sixt