it didnt replace anything afaik they still manufacture topmax, topmax is a flower booster while bioheaven is a stimulant and health enhancer in general (really i believe its the aminos). its too dilute and very expensive. if it was more concentrated i could buy it but really 99.9% water.
op you can just grow plants with bio grow and bloom. alg-a-mic is not necessary but good for micros and thats about all you need. the rest can also be used if you want to but not essential. activera is aloe vera, bioheaven is aminos and topmax is flower booster.
you can just use aloe gel instead of activera or fresh aloe pulverized in a blender would be an even better substitute and cheaper
bioheaven is non essential also, plants make their own aminos but supplying them with aminos saves them some energy so not detrimental but there are cheaper amino options for plants out there without sacrificing quality one bit
topmax is the flower booster but before adding boosters and shit i think you should dial down the base nutrients and grow healthy plants and once you do perfect it then you can push them a little further with a booster imo.
so basically the base nutrients are grow and bloom and maybe alg-a-mic.