Awesome thread!
I have always been of the mind set that auxins and cytokinins are plant hormones with two distinct actions and shouldn't be used untop of each other at the same time, rather used together at the right times.
I like to use a 'root stimulator' in early veg to encourage root growth, then spray a kelp product(floralicious+ has been my favortie for this) to encourage lateral growth/more bud sites. The floralicious+ foliar is something I just got into a few months ago, but all my plants absolutely LOVE it. After a good spraying with kelp extract my plants explode! So much so that I only use it once a week or every other week.
I've made it too strong before, which results in curling and sometimes burnt leaves, but I got it down now. 1tsp/floralicious plus per liter of RO water.