The difference between being a good DPS and a great DPS is macros. If you have a combo rotation as a macro and use it instead of manually doing it, your damage does decline. That being said, macros are often used not because of laziness, but because of crossbar space, especially on PS3. Also, as a SCH, I do have 1 DoT macro I use for downtime in healing, as well as my pet's abilities on obey. Macros as a SCH are pretty much necessary. On my PLD, not necessary. On my DRG, only Jumps are macroed with invigorate, and just FYI, you can interrupt macros by hitting another GCD spell or skill, it's not like you're locked in. But yes, to be the best DPS, limit your macro use.