@Lachesis: Lancers will give you a problem; but I don't expect there to be a lot of lancer squads at regionals.
You will also have to worry about swap squads. If your opponent can position themselves to take out your Captain and/or Quartermaster, you'll be in a tough position for the rest of the match.
The new Bastilla can also give you a head ache with her ABM. Here's a semi-competetive squad that may give you a run for your money:
http://www.bloomilk.com/Squad/99295/jbmI'll let you know if I think of anything else.
Sincerely,
Jester007