Moscow is 2 hours behind Islamabad
Best overlap: 10:00 AM to 6:00 PM in Islamabad is 8:00 AM to 4:00 PM in Moscow.
Your window to reach both cities is 10:00 AM to 6:00 PM in Islamabad, which converts to 8:00 AM to 4:00 PM in Moscow. 8 hours of shared hours is more than enough — slot meetings wherever they're most convenient for the people involved.