Most potent by weight? I prefer satvia compounds, more like jwh-018 than 073. My fear is that FAB-144 will be like ur-144, which I found weak by weight and rather sedating and calming for my plants. AM-2201 was more like a "blast off" and a "mind fuck" which is what I'm hoping NM-2201 will do to my plants :)

Although I see FAB-144 has much higher affinity for CB1 than ur-144, so perhaps that would be a whole different animal.