According to Agha Sistani, fitra should be given to eligible Shia Itna Asheri momins, based on obligatory precaution, which means that one has a liberty to look towards next most knowledgeable Marja after Agha Sistani.

Can you can let me know according to your understanding on a Mujtahid who is next in line after Agha Sistani.

According what is known in Hawza, Sayed Mohammad Saeed Al-Hakeem, and Sheikh Ishaq Fayyadh.