So when yu say stock LCA's are you referring to the 2013 ones that are on the Track Pack/Boss and GT500? these were tauted as being stronger and stiffer, but not sure if same on all mustangs.
I have springs, adjustable PHB and adjustable front and rear sways and absolutely love the way this car handles. stays tight and flat through the corners and feels great.
I use the FRPP brackets with Steeda LCA's mounted in the top hole. The brackets made a world of difference with traction on a the lowered car (now P springs). It was surprising how much traction was lost with even a mild drop.
When you say hook better do you mean at the drag strip? If so they all work together, your control arms are only as good as your shocks/struts, not saying they won't make a difference, but what good is adjustable control arms without adjustable shocks/struts, if you are talking about drag racing that is. As for handling and road course stuff that is out of my league lol.