By Matt Hardy Like most people, I will look at this weekend’s Investec Champions Cup fixtures and go on to predict a final between four-time champions Leinster and five-time winners Toulouse. The two clubs are European powerhouses and it would take some upset by either Harlequins across the English Channel or Northampton Saints across the Irish Sea to prevent that outcome. But let’s humour ourselves and look at what each of the Premiership teams needs to do to upset the odds and reach the final at the Tottenham Hotspur Stadium later this month. In Northampton’s case, they’ve done the hard bit …