In the last few years we've gotten some good data from studies, finally being done with drug cannabis, that proves high levels of phosphorus, for ex, are counterproductive. In that study, yield was highest between 30-90ppm P (with 30 ppm P having 80% the yield of 90ppm), BUT <30 ppm P contained the highest levels of THC.
https://www.frontiersin.org/articles/10.3389/fpls.2021.657323/full Yield went up slightly with higher P, but cannabinoid levels went down. This isn't the only study to show a decline in cannabinoid levels as NPK increases either. I'm curious to see why you guys are pushing high EC, what is the result you hope to achieve? Higher yields? I've always associated lower EC fed crops with increased quality and better flavor, and also, as Kassi noted, lower costs and less waste. Most fertilizer schedules set high EC levels because they want to sell product, that's how its always been.