I think she will play SMART, and evict Erika.If she doesn't and Erika wins final HOH , Boogie goes to the final with Scrubica.
Will is probably gonna throw it, so he doesn't have to choose, so Janie will only have to beat Boogie to make Final two.
Remember back when Jase wanted to be able to play in the next weeks POV? He was voted out, because he didn't try for the one he was playing in. He never got the chance because he was gone.
Sure sitting next to Erika is a slam dunk in the vote for Janie, but if she doesn't make final 2 it won't matter.
Getting rid of Erika now, gives her a better chance to make the Two spot. It won't matter who she can beat, if she isn't there.