A self-improvement tool is needed in this game, especially for end game

[thegreatonemal]

This wouldn't work because openers and rotations change all of the time based on player experimentation. Best thing they could do are things more along the lines of combos, positionals, dot uptime, etc.

They changed based on speed runs or party setups. Openers are the most important thing to learn for endgame content as they set you up for the rest of the fight. And all classes have a general opener to use doesn't need to be the best for every single encounter but it provides a baseline for the lowest players among us to hit.