Don't sweat it man! You're doing a great job.
I usually only use the build a flower twice, once at the setup of the earth box....... So it will be ready when needed......... And then roughly 10 days to two weeks from seeing flower beginning....... so it will carry it to the end.
I do like the Bloom booster. Like in any liquid amendment In an Earthbox, I'm careful about getting anything washed into the reservoir. I time it to coincide with the need to fill the reservoir after the slight dry down. It's pretty much ready For the plant to take up when you apply it.
Remember, you're growing in Earth boxes. As long as you keep nutrients out of the reservoir, you're not forcing the girl to uptake anything............... for the most part. With the topdressing mounding in the center of the Earth box, the girl can pick and choose what she needs and wants. She has the 'clean' water in the reservoir to use.
When I talk about using multiple sources of the same nutrient, I halve the amounts. The thing about multiple sources is that the nutrients are available at different rates at different times. Two products you're not gonna have the exact same availability. I have used the Bloom Booster and Blue Gold Flower at the same time, but I halve the rates of normal what I would use.
You're covering more conditions and the plant's current needs. I don't think you're going to run into any problems, unless you just go crazy with the additions............... And you have NOT shown any trends In doing something like that.
Man, it comes down to this. You've shown to be A very competent grower. I don't think you need to do any drastic changes or anything like that. All you need to do is refine what you're doing that makes sense to you .