We can see to the left of your post who you are, don't sign your posts.
First of all I apologise for not providing a Rawr output, but I am sure there are those on the forum more experienced in doing this if there is any substance to my feedback.
The suggested optimal Arcane set (post #50 by Korrigan) uses an arcane spec with 3 points in focus (is anyone actually playing that?). I am Horde and using the prefered spec with 4 points in Stabilty, 1 subtlety, 2 focus, as recommended by Manly. I am left considerably (24 points) under the hit cap, and the suggested set works relatively poorly in my comparisons.
The highest dps set I can find for Horde and this spec makes the following changes :
Boots of Impetuous Ideals -> Arctic Tramplers
Embrace of the Spider -> Dying Curse
If someone more experienced with Rawr could confirm or refute my findings, I'd appreciate it.