The Arab states that host US bases live on either oil or tourism. IRGC should focus on destroying both sectors. Show the Arabs that having US bases comes with a huge risk and no benefit.
On Israel they need to inflict psychological damage. Keep the public running to shelters and disrupt the society. Hit economic centers, refineries, desalination plants, power plants etc. Kill their appetite for war.
On Americans, we need to show the public that any war with Iran is absolutely pointless, endless, expensive and only for Israel. Inflict casualties. Remove war with Iran from their vocabulary for ever.