What Iran could do to help and what it really means by "help"

What Iran could do to help the situation in Iraq is to stop funneling supplies and money to Sadr's militias. The reason they most likely won't do this is because they don't want to lose the support of their most open backer in Iraq. What Iran most likely means by "help" can be seen by looking back at Syria's involvement in the Lebanese Civil War. Syria sent in their military to support their interests, and this is most likely Iran's plan as soon as they can get the USA to withdraw.