Power Attack
Cleave
Great Cleave
Weapon Focus (Claw)
Weapon Specialization (Claw)
Improved Natural Attack (twice; Claw for 1d8)
Multi-Attack
Improved Multi-Attack
Combat Reflexes
Exotic weapons Prof (Bastard sword)
I'd check with the DM first to see if they'll allow you to wear items that improve your claws first. If so, you have 3 weapons that cannot be disarmed (or, technically, sundered) as well as two extra attacks for no penalty (1d6+5 bite and 1d8+7 claw) provided you use a one handed weapon as your primary.
4 attacks of 1d10+13, 1d810+13, 1d8+7, and 1d6+5 (+22, +22, +22 , and +16 to hit) at 10th level ain't that bad. Minimum damage of 42 if all the attacks hit.