Is there some reason it needs to have 5 signature skills instead of just a high competence? If you replace all of those with Comp X, that saves you 9 xp right there, which you can juggle around to your liking. Frenzy II would be a good start, or some grades of Swift Attack. I also think you could drop the Bite down to grade I, since I imagine mostly the point is to get people tripped. That gives you 4 points, which I think I would spend on feats. Martial Artist would be cheesy but effective, same for Wrestling Basics.
Also, by my count, that NPC is only 97 xp, but I could be counting wrong. EDIT: Nevermind, I was counting wrong. If it turns out that's right, or if you can find 1 xp somewhere else, I like Cagey. And if you have several xp left somehow (like if you passed on frenzy and swift attack), I recommend DR. But my experience is generally that DR 2 or less is pointless, so you would need at least 9 xp to make it worthwhile.
EDIT 2: Actually, if this monster is going to be tripping a lot, Kicking Basics makes it much safer for him.
If you go -signature skills +Comp X, +Frenzy II, -Bite II, +Martial Arts(for great defense) and +Wrestling Basics(for free trips), then you're at -1 xp from where you started, so you can add in Kicking Basics for only 1 extra xp, which is what I would do if it was my monster.