I noticed this missing in the Character Upgrade's at Nameless One's thread, so I wanted to add a few more attacks Duvalier can learn.
1: Fury. Learned at 12 aptitude.
2: Stimulate. Learned at 14 aptitude.
I don't tend to use either, but I wanted to include them for the sake of completeness.
P.S.
I tried to learn Vengeance with Feedback at level 3, with 33 extra experience with it. I don't have the option. My other stats are more than high enough. Anyone have any ideas?