Replying to Fighting multiple opponents

So heres the deal.  Everyone involved is 20 or so just for some background.  There's this kid who i've had beef with for quite some time.  Things kind of got escalated this summer and I have no doubt that when one of his friends moves back to B-town there is gunna be some shit.

The kid i have beef with isn't much of a challenge, but his buddy is pretty big and not a kid i would really ant to fight.  I usually have friends with me and basically any party I go to I will have more than enough back up.  If they start anything it will be when I am alone.

So my question is what do I do if this happens?  I would rather put a good hurt on both of them and get my ass kicked then run away.  Has anyone ever been in a situation like this?

I have a little bit of fighting experience and would say im reasonable tough and able to throw a punch.