The poll results over at are in, and with 36 votes they are:
Phoenix Rising - 11 votes
End of the Island Way - 9 votes
Robin Red-Tressed - 8 votes
New Beginnings - 6
The Rise of the Hunters & Final Mission - 1 vote each
So, going forward, I have decided to go with New Beginnings first because of how rabidly the plot bunnies for that story have been attacking me, already up as my newest story (with new content in the third chapter) The Unexpected Hobbit (not the most original titles, I know, but appropriate). That story will be replacing new additions to First Chapters - considering how long it will be before the next poll, I believe my time is better spent focusing on the stories I'm already writing.
Second will be Phoenix Rising, starting up when I finish Yrthbound: The Brothers' War. I suspect I'll even keep the chapter title for the story title. Third will be End of the Island Way, after whichever story finishes next. After that, I'll add some more chapters here and do another poll.