Question. what is the average of a job? there's no way at all a parser or any system could ever tell you that..
there's far to many variables... stats, gear, I level, (2 people can be the same I level but have very different gear.) I might be 315 with a 320 weapon and low tier right side. you might be 315 with a 300 weapon but higher right side stuff. that's gonna cause a pretty big difference in our results.
then there's party compositions... that also makes a pretty big difference in what numbers you can reach.... having a sch and ast, ninja and drg in your party can push your dps up a hell of a lot more than say 2 whms a mnk and a summoner....
then there's other variables like material food, pots, hell even fight strategy and boss placement can have a huge impact on your dps... it is impossible for a parser to give you an average that you should be capable of doing...
This is where SSS shines. because it eliminates every single variable. except you. it says here's what you should be capable of dps wise at whatever level that dummy is set to... if you can beat it then you have the potential to take on the content and win. if you cant you need to up your game unless you expect to be carried.
Mechanics always come first to dps. while it's true that if you're dps isn't up to snuff you'll hit that enrage timer and fail.
its also true that if you don't learn the mechanics you'll not even make it far enough to see the enrage at all.
I think people look at the dummies wrong. the dummies don't tell you if you have what it takes to actually clear a savage or extreme fight. what they tell you is whether you at least have the potential to clear that fight before you even try. if you can't beat a dummy with 100% uptime there is no way at all you're going to be able to do enough dps to clear the actual fight without getting carried by the rest of the party..
they're an entry point basically. not a decree that you can clear it