Nineteen is the magic number for qualification

Saracens are favourites for that final slot this season; with 15 points in their pockets, simply winning against Connacht today will give them an unassailable 19 points and, of course, guaranteed qualification.
Assuming Toulouse beat Zebre to win Pool 3, history too is against a non-Saracens team going through, be it Connacht, Cardiff, Harlequins, Edinburgh or second place from Pool 1.