Although Ameriflight is an excellent company. If you're flexible I would look at other places too. Right now I believe Cape Air is hiring 402 cpts if you meet the mins. Also they give bonus's is you move between the Caribbean and New England. On another note, if you dead set on Ameriflight I would go ahead and make the just as a chieftan cpt. It's good time building in a 135 company, and you build seniority.
I would make the decision soon because I would think slots would fill up with furloughed 121 pilots. Ameriflight would be a good company to hunker down in during this hard period.