So, in your opinion, everything is normal. You know the meaning of "normal", right?
Coz I checked many other sins and none can perform like this. Normal means that an average of half the ones I checked should perform the same or at least something close to it...and no, ther's no way.
So, if you are so sure and you are a sin, just give me your IGN and I'll come to check your dps. Coz actually you are saying that "matemathically" this thing is possible, but still ther's no proof.
I'm telling you it's hard to keep up "skill-aa-skill" at any given second for several seconds. Not to mention he's also able to perform "aa-skill-aa-skill" in the same second several times under flurry.
If it's normal, prove me wrong.