I suggest piling them into Strength and Vitality, with maybe a little in Speed if you're so inclined/like assassin types.
As for skills, go for Wound, Predator Form, Vicious Strike, Integrity, Disrupt, Savagery, Evolution, Break, and Adrenaline. If you want you can also try Reform, Subversion, or endurance. It's best to invest in a few, maxed-out skills rather than trying to hoard them.