The one thing that stood out when I read your first post is the 900 TPIC. Can't speak for the legacy's but Fedex mins are 1000 TPIC. At least hang around and get that before leaving for (more) SIC time.
As the others said, I'd work on improving your resume where your at, unless you really have an itch for the type of flying that the ACMI's can fill.