I've used FloraDuo quite a bit over the years, havent really met too many others who have, and I agree that its too much N in flower. I run in promix and usually feed 2/3 of the days with about 1.7 EC using the FloraDuo with just water or Floralicious on the 3rd day and didn't run into many issues at all. I'd suggest the GH trio as you can really control the amount of N going in a lot easier. With the trio, you can do whats called the Lucas Formula using just the Bloom and The micro at a 2:1 ratio. It will give you a proper 1-2-2 NPK that a lot of plants seem to like. I still use the Grow in the first couple weeks, but go to the Lucas after that.
I would be weary about your rez temps tho. 72 is high, not crazy high, but enough to start encountering root issues. Do the roots smell bad at all? Possible to get a picture of them? Idk, the other dudes could be right about it being a strong feed but ive literally never burnt a plant with FloraDuo and have gone much higher than their chart suggests. All strains are different though.