As per my limited knowledge the Team topping the table will head into the final
If the SF of A1 vs. B2 is a washout = A1 will advance to the final
If the SF of B1 vs. A2 is a washout = B1 will advance to the final
But i hope we beat Aussies and in doing so if could do India a favor then why not 
More important is the factor of morale boosting of beating a worldclass side
So Allah Kharey Pakistan win tomorrow and then the remaining 2 matches of tournament to clinch the trophy . Ameen