I just have built a similar assa to the one you bought
I didn't went to max block even i use stormshield instead of sop. I think you need more the dr of ss than the sop. With lw you are going to have a low fade, that means a low %dr.
Another question is kick lvl, i like it high lvl because of the damage and the ar. More lvl means more kicks and more time in the same spot. Some people like it lower to be able to move faster, but that means less damage. Less damage makes the last part of the life of the ubers longer.
The rest is pretty easy. One point in cloack of shadows and mind blast for safety.
Max lighting sentry, death sentry, and its synergies. I put two points more in fire blast to have 6 explosion death sentry.
You could put one point in flying kick if you are going to use forty over enigma.