I have been meaning to update the guide for this case for a while but have been busy and had hoped that the posts in the MM thread would be sufficient; however, since the posts are now a couple pages back, it seems people are missing them.
I have updated the recommendations section in the MM guide to talk about the case. In addition, here are links to the posts discussing it:
1) Initial post after the Best DPS Thread started is here.
2) Follow on post answering question on ideal haste cap for a tight CS cycle for the AI hardcast case and where I conclude that there really is not a good feasible one is here
. Hence, the goals are as stated in the updated MM guide. Get enough haste to allow Matrix Restabilizer to always proc haste and where your AI casts are sufficiently hasted during haste trinket procs.
3) This post
explains taking the Best Possible DPS thread in context and some of the benefits it provides. In it I provide an analysis with my current gear at the time. As my gear as improved and I have obtained Matrix, I have gravitated to doing more and more AIs but still doing a decent number of ASs when I think it is necessary to do so (moving, interruption/pushback threats, out of range of melee haste totem, ect.).
There are other discussions on this case around as well.