Sharjeel time is over, he will be leftie Azam.
He doesn't even boss it in domestics and leagues now.
I would consider from below options:
1. Saud
2. Babar (he has increased his strike rate over the last year, better than Rizwan and should be more relaxed if not captain)
3. Shan
4. Fakhar (leave him alone at 4, not because he can't bat higher because we have zero middle order options and only one that can attack spin in middle overs)
5. M Haris
6. Haider Ali (can't think of any other options at the moment. He played a couple of okay innings in psl)
7. Aamer Jamal
8. Mehran Mumtaz
9. Nasim
10. Muhammad Ali
11. Abrar (if spin wicket else Abbas)
Backups:
Saim, Usama Mir, Ihsanullah, Zaman, Hurraira, Abdullah Shafiq, Haseebullah, Qasim Akram
Rest/drop Haris, Shaheen, Rizwan, Imad, Chacha, Amir, Azam, Usman, for indefinite period.
Bowling will become weaker than current t20 side but there should be no conflicts in team and its building for future. Over time can reconsider Shaheen and Haris if needed.