Barely for the same philosophy of your new decision, to reset fast a feeding disorder. Fulvic acid is acting like a “detox” agent and boost hydrogen exchange without adding much carbon in soil/coco. Very helpful for micros also. The use in you case was simple : applying a decent dry cycle, cutting the nutes and just dropping a fulvic watering that can last only 48 hours (depend on the root mass of your plants). If your plants show a sudden restart on tops and start to fade to light green on most damaged leaves, you can stop the process and start again the nutrients.
My personal opinion : On nutes, i think that you’re getting inspiration on a schedule that is not built for autos and their inherent steps of development.
Topmax : way too early. You have to wait that the flowers start to “stack” on themselves, actually they are just forming. The fulvic and humic inside are working against you, in increasing the disorder (previously with the grow compound). And it’s why the “mechanical” flush was an unnecessary stress imho.
Bioheaven : Without the Topmax it was a good move. But i rather prefer to use a good root stimulator instead in the start of the flowering stage, to secure the yield. Product like Bioheaven are best after any form of rush of the plant, to keep the grow/vigor streamlined. After the stretch, after the seedling state, in the middle of flowering stage, just before the final flush …