SSS is the best tool for optimising rotations.
If you want to do any remotely accurate test of your rotation and its dps potential then you need to eliminate as many other variables as possible that might skew the results.
how slow or fast you kill that dummy tells you a lot. it gives you a reading of your potential performance against where the game thinks it should be for the ilvel that fight / dummy is tuned at....
a parser cannot do that. all a parser can do is say your dps is x amount. it will not in any way tell you if that is good or bad considering your respective gear. nor will it give you any comparable result....
I might walk out of an ex primal with 3k dps on my ninja. you might then do the same ex primal and get 3.5k dps. but the 2 are not comparable results because of the sheer number of variables involved....
you could not say for example that you are a better ninja than me cos you did 500 more dps in that extreme primal. because there are so many variables it's impossible to make an accurate comparison.
its also possible that even though I did 500 less dps I could be a better ninja than you. because you cannot accurately say what percentage of your 3.5k dps is your dps. and what percentage is padded by various party buffs. to crit rates attack speeds etc etc.. if all those buffs for example made up 20% of that 3.5 damage then you'd only really be doing 2.8k dps in comparison to my 3k....
the end result is a parser tells you nothing usefull because there's too many variables to make an accurate comparison...
SSS you can make accurate comparisons because it eliminates virtually all variables... and will tell you a result that can be directly comparable to other players because of all those eliminated variables...
SSS also sets a bar to measure yourself against. if you're at the ilvel of that dummy test and you beat it you're playing at the level required. if you can't then you need to improve... a parser just saying you did X dps doesn't tell you anything
All in all I'm not against parsers. but I believe they should stay out of the game until players understand the information a parser actually provides and not the information they think a parser provides....
and the number of people that want a parser to test / compare there rotations and measure there dps potential. or just have a personal parse of there dps att he end of content clearly illustrate this.