If Erik is immune, and Parvati and Cirie want Amanda to go home, but dont want to vote for her...then they should try to convince Erik and Natalie (who also should want Amanda gone) to vote like this at Tribal Council:
I see what you're saying. What I was saying hinged on Cirie actually wanting Erik gone over Amanda. From what we are all speculating here it certainly seems that if everyone's top pick to go at the next TC is Amanda, there certainly would be nothing preventing them from voting her out.