After Abdullah Shafique and Mohammad Rizwan pair they also have 2 allrounders. Batting allrounder Agha Salman (management preferred him over Fawad Alam) and 1 bowling allrounder Mohammad Nawaz, he also know how to bat. They have enough batting for remaining 120 runs but again this is pakistani team, you never know.
All Sri lanka need is 1 good spell from their spinners, the way Jayasuriya got Babar's wicket i think he's could potentially create havoc on 5th day deck.
If a team like India or Australia was in this situation, I would have said that they had a 80% chance of victory. But it is Pakistan, and they are always unpredictable. I would say that now the match is evenly split at 50/50. Agha Salman is inexperienced at international level and I don't know how much prior experience has has in Sri Lankan conditions. For Pakistan to have a realistic probability to win, Abdullah Shafique need to do the heavy lifting and at least for the first session Mohammad Rizwan need to play the supporting role.
Pakistan only need less than 50 runs now and they still have 6 wickets in hand ? I wonder why cant they win from here ?