Nonexistent Proficiency Combinations in 1.salt, Promoted classes only
1. Lance/Light
2. Lance/Dark
3. Lance/Bow
4. Axe/Light
5. Axe/Anima*
6. Bow/Lance
7. Bow/Light
8. Bow/Dark
9. Heal/Dark
10. Light/Dark
11. Light/Anima
12. Hidden/Sword
13. Hidden/Axe
14. Hidden/Light
15. Hidden/Anima
16. Hidden/Dark //Useful part of this list ends here
17. Perform/Lance
18. Perform/Axe
19. Perform/Light
20. Perform/Anima
21. Perform/Dark
22. Perform/Heal //NEVER ADD THIS
23. Perform/Hidden
*Technically exists on Bounty Hunter, but that's a rather special case. Technically, all of these but Performances exist on said class.

Extant Dual Proficiencies at First Class in 1.salt
1. Sword/Lance
2. Any physical/Heal
3. Hidden/Dark
4. Hidden/Heal