I'm a bit late on this convo however I love talking shop about crop steering!
We currently use aroya sensors along with the hydro x pro controller for environmental and irrigation controls. I used the blue lab pulse for a while and while the WC readings aren't terrible, the EC portion of the sensor is measuring bulk media EC, not pore water EC, which is a more effective metric for measuring nutrient availability as far as I understand it.
I'm always playing with WC. The first week of bloom I keep it real high, 60% with 20 ish % dry downs. Then once the stretch begins I go lower. 40% with bigger dry downs. Once flowers have set, I'm bringing that WC up and EC down and giving those girls a totally stress free environment so they can bulk their little hearts out. Then for the week before flush, EC stays down and WC goes way down. 40% with huge dry downs, as much as I can get away with all the way through to harvest. These are ball-park numbers that definitely are strain dependent. Hope that helps a bit.