My very first AA spec was INT 4-4-8, STA 4-4-8, WIS 4-4-8....dps was pretty decent. I got some gear/spell upgrades and respec'd to STR 4-4-5-4-8, INT 8-8-8 and my dps got better (hard to tell whether it was gear/spells or the AA spec). What I'm going to try and do is take my current spec and do some fairly standard tests...then respec to STR 4-4-8, STA 4-4-8, INT 4-4-8 and do those same tests.
I'm guessing that the dps will be very similar in both builds, melee crits might edge out on single targets, but end of STR line might edge out on groups is my theory right now.
Either way, I am enjoying the STR end ability....Tap Veins, Mana Sieve, HT, FD, Evac....everything is a lot nicer when it's up 10% sooner.