I recently played in my first tournament a week ago. It was a small event and I wanted to take something that I would enjoy flying. I saw a list on the forums that someone posted (It was two Firesprays, Kath Scarlet and Boba Fett with Engine Upgrade and Expert Handling for 99 pts). Out of my four matches (twas a small tourney) I had a much easier time against rebel players than I did against other imperials (I played against two tie swarms and lost). Any suggestions on how to deal with tie swarms using these two ships? I have looked at dropping one firespray and giving the other one assault missles/bombs and am still not sure what to do.

Use Boba Fett's ability and upgrades to stay behind the TIE swarm. Don't K-turn, if you can help it. Always remember that you can shoot backwards. I also recommend Navigator on Fett, then any time you reveal a bank maneuver, you have all six to choose from. He is also the ultimate anti-blocker pilot. The swarms will try to block you and deny you actions. Often more important to make sure you keep your action than to stay out of arc. And target Howlrunner first with maximum prejudice. The swarm's hit average will drop significantly after Howly is gone.

I also had gunner on each of them (Forgot to mention that earlier). I really liked being able to shoot again if I missed.

Gunner is great. You might also consider Seismic Charges. It's easy damage against Swarms and easier to deploy against them as opposed to many other lists.