Found a couple more arrowheads. Edit: Adding more (confirmed in-game).

Weakening Arrow | Debuff Strength Potion + Arrowhead
Blinding Arrow | Debuff Perception Potion + Arrowhead
Cursing Arrow | Debuff All Potion + Arrowhead

Incidentally, while figuring this out I also found:

Debuff Strength Potion | Poison Potion + Tooth
Debuff Perception Potion | Poison Potion + Eye
Debuff All Potion | Debuff Strength Potion + Debuff Constitution Potion*
* I think any two different debuff potions will work, I only had a debuff strength and debuff con potion to try.

Last edited by camelotcrusade; 05/07/14 10:20 PM.