I actually like every idea on this thread so far. The Beige orb will let Duvalier have a counter-attack, which is nice because so far Griffin is the only character to get a counter. The Red Orb was already discussed with the inclusion of Vendetta in "Formulated Teammate Attack Ideas", and the Tan Orb will be very useful- however, it should not be obtainable untill after Duvalier learns Knife. Also, the Beige orb is a good idea. The only issue is that Beige and Tan might be tricky to distinguish, but thats just IMO.
I would also like to see the Crystal Orb (Physical res.) included