Originally Posted by Shurrikan
4. Combat Manual
This is your spellbook, but with a crucial difference: it previews the skills in actions, aids in theorycrafting and CD alignment, makes recommendations, and allows the saving of rotations to be progressively displayed on screen when practicing in a dojo, training ground, proving ground, or against a striking dummy, and records how you varied from the given rotation, even allowing you to compare your parsed (ability-by-ability) rotation against your theoretical. It's a massive training tool, essentially. While aided by universal and consistent access to parsing, it does not require such, and can be used solely at player convenience.