Would you like an in-game parser?

[KarstenS]

People don't need a parser to do better, they need the interest in learning the maximum DPS Rotation

When you only want to fight a dummy, thats enough.

and the ability to react to mechanics that would attempt to disrupt your combo to minimize lost DPS.

This statament is wrong. When you do it this way you will be far behind good damage dealers and never beat DPS checks like hands of pain in content like A3S. Knowing the basic rotation just the beginning. In real fights you have to rebuild parts of it to get out the maximum possible damage. To find the best solution, you need to know the result of the changes. And the result of the changes you only get by knowing the numbers.